
How can something be someone´s property?
think that one way we can understand this through the use we give to things and we can say that we own something because it belongs to us. You can have property over something or someone if you earn it or in a bet.
if you made something that means that is yours because you made it, and if someone try to take it, you will always know that tou made it no the person who wants to take it.
Then we say that something becomes the property of someone when the thing o the person fall under our power and we can say that we are the authority, and we have the ability to decide on what to do with that someone or thing.