Final answer:
The last Ice Age resulted in the expansion of ice sheets, tundra, steppe environments, and deserts, but it did not lead to an increase in the size of African rainforests.
Step-by-step explanation:
The last Ice Age, also known as the late Quaternary period, resulted in several changes in the Earth's climate and habitats. The correct answer is c. The increase in the size of African rainforests encouraged a temporary return to vegetarianism. During the Ice Age, the expansion of ice sheets and the cooling climate led to the growth of tundra and steppe environments in certain regions and the expansion of deserts. However, the increase in the size of African rainforests did not occur as a result of the last Ice Age. Instead, the Ice Age led to more drying and changes in vegetation in Africa.