Answer: A "The Decrease in trade among societies
Explanation:
As cities grow, s does their impact on other societies. In order to grow more, cities need to trade materials they have abundance in for materials they don't
The answer is A. treeless with tall grasses that provide food and cover for animals. The prairie is an interesting terrain. There are animals but many of the animals are survivors. The system is naturally good. One example of a Prairie is in the Midwest of the U.S.
Answer:
Both explain how the movement of the Earth's crust occurs.
I think your answer would be biomass. If the earth uses too much of it, it will take too long to replenish. Hope this helped could I possibly get brainliest?