Question

Which sentence uses a verb that agrees with its subject?

A.
Leaves blows in the strong wind.

B.
Cobwebs cover the windows of the old house.

C.
Acorns falls from the oak trees in the woods.

Answer 1

B is the answer because if you read the other two answers they don't make sense

Answer 2

The sentence in which the verb agrees with its subject is

B. Cobwebs cover the windows of the old house.

The others should read

Leaves blow in the strong wind.

Acorns fall from the oak trees in the woods.

Hope this helps.