Here's why:

* Chloroplasts contain a green pigment called chlorophyll.

* Chlorophyll absorbs sunlight.

* Photosynthesis is the process where plants use sunlight, water, and carbon dioxide to create their own food (sugar) and oxygen. This process occurs in the chloroplasts.

So, while the whole plant needs to work together to survive, it's the chloroplasts that are the tiny factories making the plant's food!