What are the most prominent features of airflow above the friction layer?

Which country is currently the most populated country in the world? a. india b. china c. mongolia d. indonesia

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

How are the arctic and antarctic circles alike?