Question

read the paragraph.
1 tia and jackie are partners in science class. 2 they have a big project to complete and are having trouble agreeing on an idea. 3 jackie would prefer to study geology, but tia is more interested in human biology. 4 ultimately, they decides to study fossilization.
which sentence has a subject - verb agreement error?
sentence 1
sentence 2
sentence 3
sentence 4

Explanation:

In sentence 4, the subject "they" is plural. According to the subject - verb agreement rule, the verb should also be in the plural form. But "decides" is the third - person singular form of the verb "decide". The correct form should be "decide".

Answer:

sentence 4