Personal Pronouns
I , you, she, he, it, they, we, you and me, you, her, him, it, us, you, them
They refer to specific persons or things (that have been already mentioned) and change their form to indicate person, number, gender, and case.
We usually use "it" for an animal. we can use "she" or "he" when we think of an animal as having human qualities or a special personality, for example : when it is a pet or a character of a story
Subject (subjective) Personal Pronouns are pronouns that perform the action in a sentence. Some examples of subject pronouns are I, you, we, he, she, it, they and one.
Object (Objective) Personal Pronouns are pronouns that receive the action in a sentence. Some examples of object pronouns are me, us, him, her and them.
Examples : Pooh is a friendly bear. HE enjoys eating and playing with HIS friends. I saw HER yesterday