From the given jumbled parts, we can make out that the sentence is about dissatisfaction regarding extinction of dinosaurs and what it resulted in. The sentence should start with part C which mentions the dissatisfaction regarding conventional knowledge. It should be followed by part E which mentions what the knowledge is related to. What this dissatisfaction created is mentioned in part D which talks about an observation that is surprising. This observation created a new hypothesis as mentioned in part A. Part A is linked to part D by part B. So, we get the sequence CEDBA, making option A the correct answer.

Correct sentence - Dissatisfaction with conventional explanations for dinosaur extinctions led to a surprising observation that, in turn, has suggested a new hypothesis.

From the given jumbled parts, we can make out that the sentence is about a debate which has ended. The sentence should start with part E which mentions the subject of the sentence (debate). Parts C and D form the phrase ‘whether Australia will have a’, which logically comes after part E. What Australia will have is explained in part B which comes in the fourth position keeping A for the last position. So, we get the sequence ECDBA, making option A the correct answer.

Correct sentence - The debate on whether Australia will have a nation-wide carbon trading scheme ended last week.

From the given jumbled parts, we can make out that the sentence is about a certain historical figure. If we arrange parts A, B, C sequentially, we get a logical phrase that talks about how Earhart is a famous American. Parts ABC should be followed by part E which describes her area of work for which she is famous. Part D comes in the end. So, we get the sequence ABCED, making option A the correct answer.

Correct sentence - Earhart is considered as one of the best-known American woman pilot in the world.

From the given jumbled parts, we can make out that the sentence describing trees in a rainforest. The first segment should be part D which talks about the rainforest having something. What it has is explained in part E which comes in the second position and talks about a type of tree. Where these trees grow is described in parts B and C. BC is linked to part E by part A. So, we get the sequence DEABC, making option E the correct answer.

Correct sentence - The rainforest had plenty of red cedar, which grew along the river banks and over the floodplains and foothills.

We can arrange the given sentence by answering a few questions.

Who is the subject? – Vikings (part B comes in the beginning)

What did they bring? – reindeer (part C comes in the second spot)

From where did they bring the reindeers? – from Norway (part A comes in the third spot)

To which place they brought the reindeers? – to Denmark (part D comes in the fourth spot)

The purpose of bringing the reindeers is explained in part E which comes in the last spot

So, we get the sequence BCADE, making option D the correct answer.

Correct sentence - Vikings brought reindeer from Norway to Denmark for trade purposes.

A and B and C and D need to be interchanged respectively to make the sentence both contextually and meaningfully correct. In this question we are talking about a species Tasmanian Devils which became extinct in mainland Australia 3000 years ago. The word ‘wild’ means a place which is uninhabited or desolate. Sometimes it is used for jungles where human do not go usually. So, it is the correct word to be used at B whereas the word ‘devils’ is apt at A. The word ‘marsupials’ may seem correct at C as it means any Australian animal that carries its baby in a pocket of skin (pouch) on the mother’s stomach. But if we look carefully, since we are talking about releasing the animals into the wild so, it must be in Australia’s mainland. Also, the adjective feisty qualifies the noun marsupials correctly. So, C and D should be interchanged.

Hence, option D is the correct answer.

Since in the last part of the sentence we are talking about a problem related to large area of land, so the word that goes with it is ‘desertification’. The word means ‘the process of becoming a desert or of making an area of land into a desert’. Also as we are talking about water problem in India so the word ‘situation’ fits at A. At D the word ‘depleting’ fits well. It is the present participle form of the verb ‘deplete’ which means ‘to reduce the amount of something so that there is not much left’. It gives meaning here as the word is followed by the word ‘aquifers’. Also, in place of C the word ‘owing’ is correct. ‘Owe’ means ‘to have something (for the reason given)’. Here the ‘tremendous water-stress’ is the reason behind the grave water situation in India.

Thus, option B is the correct answer.

The given sentence makes perfect sense as given. It says that often for-profit institutions are criticized because they focus primarily on the increment of number of enrolments to earn a maximum profit. In the process they sometimes forget the bigger cause which is the overall learning outcome which gets deprived.

Hence, option E is the correct answer.

‘Amplify’ means to increase in size, volume or significance. The word is generally used to indicate increase in the magnitude of the amplitude and not in numbers. Of all the given sentences, only alternative 1 uses ‘amplify’ in the aforementioned context.

Hence, the correct answer is A.

“Mean” carries several meanings:

a. Verb- intend to convey or refer to (a particular thing); signify

E.g. Does it mean that you would discontinue with the project?

b. Adjective- unkind, spiteful, or unfair.

E.g. The giant was mean to the children who played in his garden.

c. Adjective- very skillful or effective; excellent.

E.g. He's a mean cook.

Among the following, the meaning conveyed in (a) fits in (1), (c) fits in (2) and that of (b) fits in (3). The expression “a mean steak” means a perfectly cooked steak.

Thus, option E is the correct answer.