Question

In this sentence, what part of speech is the word in bold? Many trees mature in about thirty years.

verb
noun
adjective
adverb

Answer 1

Verb

Explanation:

It presents what the trees are doing.

It can't be a noun because it is illogical.

It does not modify the noun either.

It does not modify verb, adjective, or any other adverbs.

So in this case, it is a verb