Humans have changed some of Earth’s environments much more than others. Which describes an area where humans have caused the most change to an environment? A. a rural area
B. an urban area
C. a natural area
D. a suburban area

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.

vodka and hennesy

explanation:

it's c.us forest service