What is the coldest layer of the atmosphere

Which phrase describes the time it takes for a planet to make a complete rotation

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

Countries trade with each other because resources are not evenly distributed across the globe. true or false