Human nature . . . . . . . from person to person. A. vary B. very C. varies D. veries

The correct answer is “varies.”

“Vary” is the verb that means “to be different from one another.” It is the only option that is grammatically correct and makes sense in the context of the sentence.

“Very” is an adverb that means “to a great extent.” It does not make sense to say that human nature is “to a great extent” different from person to person.

“Varies” is the past tense of the verb “vary.” It does not make sense to say that human nature “varied” from person to person.

“Veries” is a misspelling of the word “varies.” It is not a correct answer.