How do terrestrial animals protect themselves from the danger of dehydration of bodies?

Explanation

In the absence of an external source of water, the kangaroo.rat of the North American deserts is capable of meeting all its water requirements through oxidation of its internal fat (in which water is a by product - metabolic water). It also has the ability to concentrate its urine, so that minimal volume of water is lost in the process of removal of their.excretory products.