Answer:
it's own gravity pulling in
Explanation:
<em> just took the test.</em>
The answer is D. Exosphere
Exosphere is the outermost Layer of the Atmosphere that goes out about 500 - 10,000 Km in altitude.
It's the place where satellites and the space shuttle orbit the earth. Because it's difficult to define the boundary between exosphere and the outer space, exosphere may be considered as a part of outer space
The greatest is coal and then the second greatest is oil
