Answer: thermosphere is the layer of the earth's atmosphere directly above the mesosphere and directly below the exosphere while mesosphere is layer of the earth's atmosphere that is directly above the stratosphere and directly below the thermosphere.
I believe the best answer is C. i mean it has already made that progress, hints the term developed, not developing. i hope this helped, have an amazing day :)
The slope of the line is m = -1
It goes horizontal. You can't really say it goes from left to right or other way around. However, the more degrees west, the further to the left. More degrees to east, more to the right