Which half-circle is the largest on parallels or meridians?​

At which point on the diagram do convection currents occur to drive plate movement?

Sink holes may eventually for to join a. wide valleys b. zone of aeration c. dripstones d. aquifer

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