Which choice below clearly communicates the factors necessary to sustain life on Earth? *
O A. Depth of water, range of temperature, and air quality
O B. Depth of water, amount of oxygen, air quality, and temperature
O C. Earth's proximity to moon, certain gases and water
O D. Earth's proximity to sun, water, and gases in our atmosphere

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.

geologic time scale (for gradpoint) =)

very