Answer: Option B.
Step-by-step explanation:
Chloroplast is defined as an organelle found in green plants that contains green pigment called chlorophyll responsible for the process of photosynthesis.
Chloroplasts plays an important role in photosynthesis which is to trap light energy from sunlight and convert it into carbohydrate which further used by cells in teh form of adenosine triphosphate (ATP) and nicotinamide adenine dinucleotide phosphate hydrogen (NADPH).
Hence, the correct option is B.