Questions relating to Anarchism

Questions for Myself About Anarchism

No-one owns land If someone claims a piece of land as theirs, and defends that land with force. Is that violence?

What gives any person the right to claim any piece of land as theirs?

Does taking care of that land, building on it, planting crops on it, etc. make that land yours?

how does private property exist without state and/or its institutions?

Landlords Is being a landlord and charging people to use "your" land immoral?