Answer:
Explanation: coastal and plateau are different areas so you could talk about the food they ate / hunted. I think google would be your best option.
Answer:
D
Explanation:
There are many examples of civilizations trading because they don't have the things their trading for. Like Egypt and Nubia with gold and ivory, Mesopotamia, and Indus Valley civilizations with spices and textiles, China made a road for trading silk with other civilizations because they didn't have it.