Are human beings matter or psych? why?

I think that human beings are both. matter because occupies a space in the universe and are formed by mass compound for blood, muscles, tissues etc.
And for Psych because is who regulates the functioning of the body. With psych you can think and reason.
They work together, the body makes that psych said.
a body can not function without a psych, and a psych without a body.
both are a complement.
We didnt understand to human being for separate psych and matter.

How can something be someone's property?

Something can be property of someone when these thing is in possession of that person,when the person has the power,and the thing belongs to the person, and this obtained by buying, as a gift receiv, stealing , or elaboring them.
A person acquires a property when law-abiding( price ) etc.
One thing becames the property of another person when between both reach an agreement of every type, can be comercial, personal etc. For example when you buy a car, a pants, etc.
Many times properties defined by the capital(money).
The laws help to difined what is from someone, for living in peace.
For example when you buying a property, given to you a papers called scriptures,with wich get a tittle of the property in this case of the house. with this you know that the house is yours.