Why do we do terrace farming?

we do terrace farming to create more farms for more food. the human population is growing right now it is at about 7 billion people so we need more food so we need more farms. we build more and more farms. after a long time we have taken up all of the flat places and we need more farms so we grow them on slopes and the sides of hills etc., etc. thank you by the way this is avery 😎😜🌮