What is the name for the lowest layer of the atmosphere, which is most influenced by human activities?
a. terrasphere
b. stratosphere
c. mesosphere
d. troposphere
e. ionosphere

Which type of seismic waves are confined at the surface

The earth rotates on its axis and revolves around the sun every

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