In the north, there is the Sahara desert. This is a vast and arid dry climate. There is very little precipitation. In the rest of Africa (sub Saharan) there is the savannah and rainforests. The savannah is a vast grassland filled with few trees and tall grass. This is located in the south area of Africa. In the middle part and western part of Africa there is dense rainforests, like the Congo. These rainforests get lots of precipitation and are gone to many species of animals, ie. Old world primates like apes. The East part of Africa is in an arid climate.
South Africa is a relatively dry country, with an average annual rainfall of about 464 mm. While the Western Cape gets most of its rainfall in winter, the rest of the country is generally a summer-rainfall region. South Africa's coastal regions are therefore relatively warm in winter.
I believe the correct answer is A. Photosynthetic organisms, because they remove certain amounts of CO2 in the atmosphere to carry out the process of photosynthesis. Unlike the other options that increase CO2.
