Final answer:
Chloroplasts are organelles found in plant cells that contain chlorophyll, a green pigment responsible for capturing light energy. This pigment reflects green wavelengths and gives plants their green color.
Step-by-step explanation:
Chloroplasts are organelles found in plant cells that contain a green pigment called chlorophyll. Chlorophyll is responsible for capturing light energy and driving the reactions of photosynthesis. It absorbs wavelengths from the blue and red end of the visible spectrum, but reflects the green wavelengths, which is why plants appear green.