What must be true for natural selection to happen? O A. All organisms must have the same genotype.
O B. There must be competition for resources.
O C. The population must be below carrying capacity.
O D. There cannot be any predators.

they both go up but then go back down. they both end lower than they started. lastly, they both are competitive/the second on.

explanation:

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.