Here's how it works:

* Chlorophyll is a green substance found in the leaves of plants. It absorbs sunlight, specifically red and blue wavelengths, and reflects green wavelengths.

* Photosynthesis: Chlorophyll is essential for photosynthesis, the process by which plants use sunlight, water, and carbon dioxide to produce food (sugar) and oxygen.

* Sunlight: When sunlight shines on a leaf, the chlorophyll absorbs most of the light's energy, leaving the green light to be reflected back to our eyes. That's why we see leaves as green.

It's important to note:

* While most trees are green, some may have leaves that are other colors, like red, yellow, or purple. This is because they have different pigments in addition to chlorophyll, which can become more dominant during certain seasons.

* In the fall, the leaves of deciduous trees change color because the chlorophyll breaks down, allowing other pigments, like carotenoids (yellow and orange) and anthocyanins (red and purple), to become visible.