Growth . usually increases the complexity of an organism's structure
is unpredictable
occurs only in multicellular organisms
only increases size of cells

A.

Explanation:

Seems like A. would be the best option here.

answer by yourhope:

answer is

human impact on the environment can be seen in the deterioration of the !

: )

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.