Answer:
Number
Explanation:
The Subject-Verb agreement has to do with Concord in grammar which says that subject and verb MUST agree with each other in number which is singular OR plural.
What this means is, if the subject of a sentence is singular, then the verb must be in the singular. If the subject is in the plural, then the verb must be in the plural.
For example, consider the sentence below:
The dog chases the cats.
The verb 'chases' is in the singular, so the subject 'dog' must be in the singular.
