What might explain the real-world results, show in the graph to the right, for one class of twenty students? Check all that apply.
A. Fourteen people were immune at the beginning.
B. Noninfected individuals never came into contact with infected individuals.
C. A few people were immune at the beginning, and other people never came into contact with the disease.
D. The people who became sick got better before they could pass on the disease.

A. Fourteen people were immune at the beginning.

C. A few people were immune at the beginning, and other people never came into contact with the disease.

E. The people who became sick got better before they could pass on the disease.

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.

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