Desert

Deserts are the world's driest and hottest regions. Most of the vegetation there takes the form of drought-resistant plants such as cacti (cactus), which store water in their stems and have waxy coverings, The animals that live in the desert are able to survive with little or no water, for example the camel that stores water and fat in its hump, or the animals that can survive under ground, because they are not able to live in the heat of the sun, they only come out in the night when it is a little cooler.

A cold desert is a desert that has snow in the winter instead of just dropping a few degrees in temperature like they would in a Hot and Dry Desert. It never gets warm enough for plants to grow maybe just a few grasses and mosses. The animals in Cold Deserts also have to burrow but in this case to keep warm, not cool. (That is why you might find some of the same animals here as you would in the Hot and Dry Deserts)
.
Deserts cover about one fifth of the Earth's land surface. Most Hot and Dry Deserts are near the Tropic of Cancer or the Tropic of Capricorn. Cold Deserts are near the Arctic part of the world.