OK, let's pretend you have a toy car. Your toy car belongs to you. It's your car! You can even say "My car!"
In grammar, when we want to show that something belongs to something or someone, we use a special form of words called the genitive case. It helps us to show possession, ownership, or the relationship between two things.
For example, when we talk about your cat, we use the genitive form: "Your cat's fur is so soft." When we want to talk about the car's wheels, we say "The wheels of the car" instead of "The car wheels".
In many languages, including English, we can show the genitive with an apostrophe s ('s). So instead of saying "The hat of the girl", we can say "The girl's hat".
It may seem a bit complicated at first, but once you get the hang of it, the genitive can help you express concepts like ownership, attribution, and relation in a clear and concise way.