Geologic time and evolution.
Deserts do not adapt but organisms that live in the desert adapt.
This started new hunting bands to adapt to new conditions and learned how to grow crops.
The desert is the environment. It does not adapt. Organisms in an ecosystem adapt to the environment.
drink of the River Nile and make money from irrigation
their ancestors lived in the desert because it was the only place they knew. The current Tuareg people live there because they want to keep their history and this involves living in the desert.
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Humans are able to alter their environment to make life in the heat of a desert bearable. Such items as air conditioning or even electric fans can make life in the desert more comfortable as well as constructing homes that are well insulated to hold in cooler air and keep out the heat.
They have to adapt to the heat of the desert and prey loss. If there food dies out they have to adapt to something else to eat
They are largely nomadic and have to adapt to meet their harsh environment.
They have a shell
They die