Extensive planting of trees to increase forest cover is called?

If scientists only detect p waves in a certain layer of earths interior what does that tell us?

Alow-pressure belt means the air is cold and dry warm and rising cold and sinking warm and moist

Which ecosystem best fits the characteristics listed below? which ecosystem best fits the characteristics listed below? ii. seasonal migrations of millions of wildebeests, zebras, and elephants iii. large numbers of predators, such as lions iv. acacia trees and grasses a. the congo rainforest b. the african mangroves c. the serengeti grasslands d. the sahel