Which of the following facts might be related to polar climates? A) Solar energy hits these regions at a low angle
B)Year round temperatures are always hot
C)These regions lie between latitudes 23 north and 23 south
D)Temperatures in these zones are moderate

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.