1.What is the depth of Lake Chad today?
A. About two metres
B. About fifteen metres
C. About fifty metres
D. It has disappeared completely
E. The information is not provided
2.In about which year does the graph in Figure 1 start?
3.Why has the Author chosen to start the graph at this point?
4.Figure 2 is based on the assumption that
A.The animal on the rock art were present in the area at the time they were drawn
B. The artists who drew the animal were highly skilled
C. The artists who drew the animals were able to travel widely
D. There was no attempt to domesticate the animal which were depicted in the rock art
5. For this question you need to draw together information from Figure 1 and Figure 2.
A. At the beginning of the most recent Ice Age
B. In the middle of the period when lake chad was at its highest level
C. After the level of Lake chad has been falling for over a thousand years
D. At the beginning of an uninterrupted dry period ​​