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.

The squirrel over there are running away from the dog.
The squirrel over there are running away from the dog.

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

The cat are climbing the tree.

Answer 1

Those birds are singing a song.