Step 3: Clarify the meaning of each term:
- Photosynthesis: A process used by plants to convert light energy into chemical energy stored in glucose. This is not relevant to human food intake.
- Metabolism: The set of chemical reactions in the body that convert food into energy and building blocks for growth, repair, and maintenance.
- Homeostasis: The maintenance of stable internal conditions in the body, such as temperature and pH, not directly related to food usage.
- Osmosis: The movement of water across a semipermeable membrane, unrelated to food intake and usage.