The newest study invalidates parts of the conclusions made in earlier studies.

What part of speech is invalidates?

The correct answer for the question that is being presented above is this one: "D. Verb." The newest study invalidates parts of the conclusions made in earlier studies. The part of speech is that invalidates is verb.

Here are the following choices:

A. Adjective

B. Adverb

C. Noun

D. Verb