The Earth's atmosphere is important because: Select one: a. it is a stable and unchanging part of our global environment. b. it is composed of approximately twenty different layers. c. it is primarily composed of oxygen, essential for our survival. d. the densest outer layer shields the Earth's surface from dangerous forms of energy. e. it protects us from UV radiation and X-rays.

e: it protects us from UV radiation and X-rays.

Explanation:

The earth's atmosphere is a major reason for the propagation of life on our planet.

All the options given here may make sense, but after a closer look and using the process of elimination we can find the right answer.

a) This is false, as our atmosphere is continually changing, this is a major concern when we talk about global warming

b) This is false, the atmosphere is composed of 5 layers

c) This is false, the atmosphere is primarily composed of Nitrogen gas

d) This is false, the outer layers of the atmosphere are the lightest, not the densest

c) This is true. The ozone layer protects us from dangerous UV Rays while the moisture in the air protects us from X-Rays.