Answer: The correct answer for the fill in the blank is D. Chlorophyll.
Chlorophyll is a green pigment, which is present in the chloroplast of all green plants. It captures energy from the sunlight for the process of photosynthesis. Light energy is converted into chemical energy in this process.
Photosynthesis is a process of synthesizing food using CO₂ and H₂O in the presence of sunlight. Glucose and oxygen ( O₂) is produced as byproducts in this process.
Thus, energy is captured for photosynthesis by chlorophyll molecules.