Which sentence contains a pronoun used as an adjective? 1. She bought the least expensive cage for George, the parakeet.

2. The blue parrot belongs to her.

3. One of the birds is a parakeet.

4. I chose that bird for its bright coloring.

The correct answer should be 4. I chose that bird for its bright coloring.

That can be treated as a pronoun that refers to a specific thing known or understood, which in this case is bird. Here it is a pronoun used as an adjective to describe what bird that is, and the answer is that bird.