While more cost-effective, boiling water reactors are disadvantageous because .

they must be built near public water sources
the steam produced has a greater likelihood of being contaminated with radiation than in a pressurized water reactor
they require much more water than other types of reactors
they take up much more space than other types of reactors

the steam produced has a greater likelihood of being contaminated with radiation than in a pressurized water reactor

Explanation:

is the correct answer.

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.