Answer:
a. grow
Explanation:
The subject-verb agreement defines the agreement made between the verb and the noun in the given sentence. It means that the verb and the noun have to agree in number with each other in a given sentence. If the subject in the sentence is singular, the verb needs to be singular too. Likewise, when the subject in the sentence is plural, the verb needs to be plural too. In the above sentence, the subject 'bananas' is plural in number, therefore, the verb 'grow' will be in the plural too.
