What is the main reason that viruses are not considered to be living
organisms?
A They are too small to be living.
B They do not have DNA.
C They need the host cell to replicate.
D
They kill the host cells.

C. They need a host cell to replicate.

Explanation:

In order for an organism to be considered living it must be able to reproduce on with its own species or on its own, (sexually and asexually) which is why we consider viruses not to be living.

as the gila monster consumes the eggs or young of the desert cottontail and gambel's quail, thus its main food supply is only accessible for a restricted time duration every year. however, for this, the gila monsters exhibit three adaptations, which elevate their survival rate in the desert condition.  

first, is that they possess huge bodies, and can consume greater concentrations of food during a small period. secondly, they require to feed infrequently as they can accumulate fat in their tails. ultimately, their rate of metabolism is very low, so that they can burn their reservoirs of fat gradually.