Задание

For this question you need to draw together information from Figure 1 and Figure 2.

The disappearance of the rhinoceros, hippopotamus and aurochs from Saharan rock art happened

after the level of Lake Chad had been falling for over a thousand years.

at the beginning of the most recent Ice Age.

in the middle of the period when Lake Chad was at its highest level.

at the beginning of an uninterrupted dry period.