1. Movement: Animals use energy to move their bodies, whether it's walking, running, swimming, flying, or even just shifting their position. This energy is used to power their muscles.

2. Metabolism: Animals constantly use energy to keep their bodies functioning. This includes things like:

* Breathing: Taking in oxygen and releasing carbon dioxide.

* Digestion: Breaking down food to obtain nutrients.

* Maintaining body temperature: Regulating their internal temperature.

* Growing and repairing tissues: Building and maintaining their bodies.