What happens to the energy that a rabbit uses for staying warm and running from predators?

Answer: The correct answer would be 'lost as heat'.

Explanation:

In an ecosystem or in any food chain most of the energy is not transferred to the next trophic level. For instance, according to the ten percent law, only ten percent of the total energy present at one trophic level passes to the higher trophic level.

The rest of the energy is lost as heat as a result of metabolism.

In this case also, the rabbit uses energy for staying warm and to run from predators. Both the processes use metabolism to produce energy. Some part of the energy is used for mechanical work and rest is lost as heat.

For example, the temperature of the rabbit's body increases after running due to which the excessive heat dissipates into the surrounding environment.

Since energy can't be created or destroyed, when the rabbit runs out of energy, it is dispersed through cellular respiration.