Which sentence has proper subject-verb agreement?(1 point)

Question

Responses

The dolphins at the aquarium is doing flips.
The dolphins at the aquarium is doing flips.

Those birds are singing a song.
Those birds are singing a song.

The cat are climbing the tree.
The cat are climbing the tree.

The squirrel over there are running away from the dog.

Answer 1

Those birds are singing a song.