Why are satellites in the thermosphere?

Since numerous satellites circle inside the thermosphere, changes in the thickness of air at orbital heights expedited by warming and development of the thermosphere creates a drag power on satellites.

The thermosphere limit and the exosphere located above it is known as the thermopause. At the base of the thermosphere is the mesopause, the thermosphere boundary and the mesosphere underneath. Like the seas, Earth's air has waves and tides inside it. These waves and tides help move vitality around inside the environment, including the thermosphere.

all fossil fuels are nonrenewable, so think coal, gasoline, things that we will eventually run out of. all fossil fuels are nonrenewable resources, but not all nonrenewable recourses are fossil fuels. these resources are not being renewed as fast as we are using them. i hope this considering there weren't any answer choices.