There are several ways to show ownership or possession in English grammar.

The way we use mainly depends on whether the owner is animate (i.e. a person or an animal) or a thing. But as always, there are exceptions to this general rule.
Animate Owners
Apostrophe
To show possession we can add an apostrophe -s (sometimes called a Saxon genitive) to the owner.
This is Amelia. Amelia owns…