Which energy source is a result of tiny sea creatures being compressed over millions of years?

The correct answer is crude oil.

Explanation:

The dead plankton settles at the bottom of the seas and oceans and because of the accumulating layers of sediments gets compressed over millions of years, resulting in the formation of crude oil. This takes place due to heat and high pressure. The extreme pressure and the heat is the source of energy, which leads to compression of tiny sea creatures and results in the formation of natural gas and oil.

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.