‘Many’ refers to a great number of things, a large amount. ‘Many’ is mainly used with countable nouns. The given sentence has the words ‘one of the’, which means one among the best. So ‘many’ is wrong.

‘Most’ is used to refer to something when it is ‘in the greatest degree’ or ‘in the majority of the instances’. Much means a large amount, but most imply that the amount is large compared to something else. ‘Very’ is an adverb, so it cannot be used as we are describing a noun (important feature). Since we need a word which describes ‘the best

among many’, ‘most’ is the correct word.

Hence, the correct answer is A.

The correct preposition to follow the word 'conscious' is 'of' and not the other given in the options. 'Conscious' means 'to be aware'. Thus, option A is the correct answer.

The use of "curious" is incorrect in context of the sentence. When something unwanted happens like drought, one gets worried and not curious. Curious means to be eager to know something. "Worried" is the correct word as per the context of the sentence. Hence, option B is the correct answer.

In most cases, the word "unacceptable" takes the preposition "to" with it. See the example: This is unacceptable to the authorities.

‘For’ should be replaced with ‘to’ in order to give the correct association between the subject ‘parents’ and ‘unacceptable’. So, option A is correct.

The sentence requires no improvement. It is in passive voice, so third form of verb (mistaken) is correctly used in the sentence. So, option D is correct.

The subject in the statement is ‘disparity’, which is singular and thus the helping verb should also be singular; thus ‘have’ needs to be replaced with ‘has’. So, option A is correct.

The preposition "to" is followed by simple form of verb and not continious form (verb+ing).
See the example: We went there to meet (not meeting) our old friends.
So, option C is correct.

‘Liberal Arts’ is the name of a subject like physics, chemistry etc. So, it will take a singular verb after it which is given in the sentence.
See example: Mathematics is my favourite subject. (not are my favourite).

Hence, no improvement is required.

The word ‘soul’ means ‘inner conscious’. It is irrelevant in context of the sentence. The word here is "sole" which means "only". "Soul" should be replaced with ‘sole’ to make the sentence correct. So, option B is the correct answer.

The noun "brunt" is always followed by the preposition "of". Hence, option A is the correct answer.