Iam the land north in the north at the niles mouth

Witch of the following volcano hazards is made up of rocky particles about the size of a grain of sand

Why is immigration so important today?

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