Here's why:
* Chloroplasts contain chlorophyll: This green pigment is essential for absorbing sunlight.
* Photosynthesis takes place in chloroplasts: The light-dependent reactions of photosynthesis occur within the thylakoid membranes of chloroplasts, where chlorophyll captures light energy.
* Energy storage: The light energy captured by chlorophyll is used to produce ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate), which are energy carriers used in the Calvin cycle, the second stage of photosynthesis, to create glucose.
