What is the purpose of hibernation?

Hibernation

Explanation:

Hibernation can be defined as the phenomenon by which the animals rest for a longer period of time almost a complete season. This is done in order to save the energy when the food is not available.

To save energy the an endothermic animal decreases its metabolic rate in order to save energy. It also decreases its body temperature.

The animals do not move from one place to another. They do not even eat food. They shut down their body for some time.

the element that provides strength to the exoskeletons of clams and oysters is phosphorus.

this is so because calcium carbonate is the main component in the shells. calcium carbonate is strengthened by phosphorus.

explanation:

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.