Here's why:

* Photosynthesis: Plants (and some other organisms) use a process called photosynthesis to make their own food (sugar).

* Ingredients: Photosynthesis requires three key ingredients:

* Sunlight: Provides the energy to power the process.

* Water: Used as a source of electrons and hydrogen ions.

* Carbon dioxide: Provides the carbon atoms needed to build sugar molecules.

Let me know if you have any other questions!