Fill in the blanks using appropriate forms of the words

Solution

Explanation:   Enormously (appropriate form of the word): In this context, "enormously" is used as an adverb to describe the degree of variation in the quality of life.   Options:   (a) Enormity: This term generally refers to the great scale or seriousness of something negative. It doesn't fit the context of variation in quality of life. (b) Enormous: This is an adjective form and doesn't fit well in the sentence structure. The adverb form is needed to modify the verb "varies." (c) Enormously: This is the correct adverb form, indicating the extent or degree of variation in quality of life. (d) None of these: This is not the correct choice, as option (c) "enormously" is the appropriate adverb form.