Digestive System. Its what makes you bm. And your bm is waste
Most things can't be explained or it hasn't been discovered yet. Science is all about asking questions and figuring out how things are the way they are.
Answer:
cara é so vc anda descanso na areia!
The answer is terracing.
Terracing is a type of landscaping characteristic for steep slopes and mountains. Graduated terraces are used to farm on this kind of terrain to reduce erosion. This way crops are planted on graduated level areas and not on steep terrain, and risk of surface runoff is reduced.