What part of speech is possessive pronoun adjective?

There are two types of pronouns that show possession, each has a different function:

Possessive pronouns take the place of a noun that belongs to someone or something.

They are: mine, yours, his, hers, its, ours, theirs.

• Example: The house on the corner is mine.

Possessive adjectives describe a noun as belonging to someone or something. A possessive adjective is placed just before the noun it describes.

They are: my, your, his, her, their, its.

• Example: My house is on the corner.