Here's why:
* Energy is essential for life processes: Everything from movement and growth to maintaining body temperature and repairing cells requires energy.
* Energy sources vary: Plants get their energy from sunlight (photosynthesis), while animals obtain energy by consuming other organisms.
* Without a source of energy, living things would die. They wouldn't be able to perform the basic functions necessary for survival.
Let me know if you'd like to learn more about energy sources in living things!
