Multiple choice Photosynthesis needs (1), which is trapped by a green substance called (2) (1)sunlight / (2)chlorophyll (1)chlorophyll/ (2)sunlight (1)oxygen/ (2)chlorophyll Reveal answer Fill a bubble to check yourself A Correct answer Explanation Photosynthesis requires sunlight as the primary energy source to drive the chemical reaction. This light energy is captured by chlorophyll, the green pigment located inside the chloroplasts of plant cells.