Earth's temperature is maintained at an average of 15 c because of our atmosphere's thickness the stagnant atmosphere the water cycle greenhouse gases

Because of the water cycle

The cooler part of the earth usually located on the higher ground ( such as mountain)

This cooler part of the earth could maintain water and keep it from evaporating and later on , transferred the water to the lower ground

Place the point of the compass on point b and draw an arc that intersects  be¯¯¯¯¯  , using    ab    as the width for the opening of the compass.  hope it