I'm assuming you mean topographic maps, in that case C. Elevation
The Zagros are a mountain range in Iran. Basically on the windward side of the range it'll be really wet and on the lee ward side it'll be dry probably even a desert. The warm moist air is forced up the mountain where the cooler temperatures at the top cause condensation so it rains. Dry on the other side. The main range in Turkey are called the Taurus mountains.
The main reason for the wall's construction had always been defense. Since China's first dynasty, the empire faced a near-constant threat of attack from the nomadic tribes to the north. This included those famed Mongols as well as lesser-known groups like the Xiongnu and the Göktürks.
Lake Edward is the smallest lake in Africa.