Areas with hypoxia are known as __ zones

The answer is : dead zones.

Dead zone.

Explanation:

Hypoxia may be defined as the condition of the reduced level of oxygen in the environment. The hypoxia condition of the sea may occur due to naturally or artificially.

The hypoxia area are commonly known as dead zones. This area leads to the death of most of the marine organism due to the deficiency of the oxygen. Excess nutrients flow in the river causes the more chances of the development of the dead zones.

Thus, the answer is dead zones.

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.