form when water vapor condenses around
particles in the air

Cloud

Explanation:

Clouds forms when invisible water vapour from the earth rises and turns to visible water droplets. This is caused by radiation of the sun on the earth surface, causing evaporation from the earth and is taken up the sky forming a cloud. It is also known that the more water vapour condenses into droplets, the greater amount of cloud that id formed.

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint