Which of the following has increased agricultural efficiency the most? the use of crop specialization
the use of animals
O the use of machinery
the use of crop rotation

:calculate the sum of the interior angles of a 13-sided polygon.

Religious beliefs of indigenous peoples of oceania connected them to

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