Here's how it works:

* Chlorophyll: This green pigment found in the chloroplasts of plant cells is responsible for absorbing light energy.

* Light Absorption: Chlorophyll primarily absorbs light in the red and blue wavelengths, reflecting green light which is why plants appear green.

* Photosynthesis: The absorbed light energy is used to power the process of photosynthesis. This process converts carbon dioxide and water into glucose (sugar), which provides energy for the plant to grow and thrive.

So, in short, the plant needs chlorophyll to capture the sun's energy, and that energy is then used in the process of photosynthesis to create food for the plant.