Which sentence contains a pronoun used as an adjective?

The blue parrot belongs to her.

I chose that bird for its bright coloring.

She bought the least expensive cage for George, the parakeet.

One of the birds is a parakeet.

I'm not 100% sure. but I believe it's the third option

"She bought the least expensive cage for George, the parakeet."

The answer the second option: I chose that bird for its bright coloring.

Explanation:

In the sentence "I chose that bird for its bright coloring", we have a demonstrative pronoun.

Demonstrative pronouns are words used to indicate items in space or time. They can be singular or plural: this, these, that, and those.

As we know, pronouns are used to refer to nouns by substituting them. However, they function as adjectives in case they accompany a noun. In that case, they are modifying that noun. That's exactly what happens in the sentence:

- I chose that bird for its bright coloring.

The demonstrative pronoun "that" is functioning as an adjective since it is modifying the noun "bird": it's not any bird, it is that bird.