After reading the sentence and analyzing the options, we can choose the following as the one whose pronoun agrees with the antecedent:
1. They are marsupials.
<h3>Pronouns and antecedents</h3>
A pronoun is a word used to substitute or refer to another word in a sentence. The word a pronoun refers to is called an antecedent.
In the sentence we are analyzing here, we must choose between "it" and "they". The sentence is about "kangaroos, koalas, and possums," three nouns, all plural.
Therefore, there is only one correct choice. It is number 1. They are marsupials. This is the option that uses a plural pronoun.
Learn more about pronouns and antecedents here:
brainly.com/question/921696
