Question

Which type of pronoun is italicized below When Amanda picked up Rosario's cell phone by accident, Rosario kindly said, "I think that is mine."

Answer 1

Assuming that ‘mine’ was underlined, then it is a personal pronoun.

A pronoun is used to substitute a noun. In order for it to substitute, it must have a clear antecedent. Personal pronouns are used to substitute nouns with ownership. There are three persons point of view.1st person is when the subject is the one who is speaking (e.g. I, me, my, mine, we, us, our, ours). 2nd person is when the subject is the one being spoken to (you, your, yours). 3rd person is when the subject is the one spoken about (he, him, his, she, her, hers, it, its, they, their, theirs).

Answer 2

If THAT is  italicized it would be relative