The perennial system is less dependent on the Nile flood and allows the planting of multiple crops. (source: another brainly question)
Answer:
Earth? I think...........
Well there are many words that can answer that. Is there a word box or hints towards the specific words? If not just say heavily.
Answer:
i would believe it would be mountains or canyons. cuz either the ground would be pushed up or it would cave in like the grand canyon.
Explanation: