Answer: Erosion is the geological process in which earthen materials are worn away and transported by natural forces such as wind or water. Because of this I believe this this statement completely.
Explanation:
Erosion is the reason why have so many great structures today such as the grand canyon.
Answer:
Other common constraints on development are high economic poverty, hunger, high mortality rates, unsafe water supplies, poor education systems, corrupt governments, war, and poor sanitation.
Explanation:
Answer:
It should be the persians.
Explanation:Technically it is persians since they're referred to that even today although iranians referred to themselves as aryans back then.