Photosynthesis provides what for plants and people

Photosynthesis is the process by which plants use sunlight to synthesize food from carbon dioxide and water. During photosynthesis, plants release oxygen as a byproduct, so photosynthesis provides food for plants and provides fresh air for people to breathe.

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.

answer; the above statement is (true);