Water is the substance that is used up during photosynthesis.
The correct option is D.
What is photosynthesis?
Photosynthesis is the process of converting chemical energy into food for plants.
Plants are autotrophs who prepare their own food with the help of carbon dioxide, water, and chlorophyll into sugar.
Water and carbon dioxide are consumed in this process to make sugar, and oxygen is released.
Thus, the correct option is D, water.
Learn more about photosynthesis, here:
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