Improve the highlighted part of the sentence.
The day are warm, so the students ate their lunch outside.

Correct option is A

The correct substitution of the highlighted words is (a) is warm.
Explanation: The subject “ day” is singular, so the verb must be “is”, not “are.”
Grammatical rule used:
· Singular subjects take singular verbs (He is, She goes, It runs).
· Plural subjects take plural verbs (They are, We go, You run).
Example:
Incorrect: The boy are playing.
Correct: The boy is playing.
Information Booster:
Even when part of the sentence uses plural nouns (like “students”), the verb must match the true subject of the clause.