The correct answer would be D, gravity. As moving water will cause rocks to erode as well as wind, and animal habitation.
The Calvin cycle (also known as the Calvin–Benson cycle) is the set of chemical reactions that take place in chloroplasts during photosynthesis. The cycle is light-independent because it takes place after the energy has been captured from sunlight.
True....................................................................
A. True
However, this is not necessarily the only factor that makes this true.
If I recall correctly, I was taught:
The particles in the air (dust, smoke, etc.) increase in density the farther you look. Causing a "fog" effect as you look across large distances. Including shore to shore of an ocean.