Anything that doesn't have to to with the living organisms or life in that sphere such as a rock or the dirt. It would help if you posted options. :) hope this helped
Answer:
it generates NADH for use in mitochondrial ATP production
Answer:
It depends on the angle of the earth's axial tilt which directly reflects the amount of solar irradiation received or not.
Explanation:
For example, If in Northern Hemisphere, there's no axial tilt then there will be no output of light energy from the entire disk of sun, hence no change in climate and if earth's tilt is 45 degree, then summers will be extremely hot because earth will be close to the sun and winters will be extremely cold because earth will be away from sun.
Your muscles contract and your arm snatches backwards because your body is trying to protect itself
