Answer:
The two reactants for photosynthesis are carbon dioxide (CO₂) and water (H₂O).
Step-by-step explanation:
The equation for photosynthesis is as following:
6CO₂ + 6H₂O => C₆H₁₂O₆ + 6O₂
The reactants of a chemical reaction are the chemicals before the arrow, before the reaction takes place. In the equation above the reactants are carbon dioxide (CO₂) and water (H₂O).