please help me if you really know i will mark brainly
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Answer:
D. Sunlight.
Explanation:-
Photosynthesis is the method that photoautotrophic organisms use to make sugar molecules. The process depends on sunlight which is the ultimate source of energy for making ATP in the chloroplasts.
Sunlight is absorbed by the photosystems in the thylakoids in order to produce ATP through phosphorylation of ADP