Final answer:
Water is a reactant in the process of photosynthesis, which also produces sugars/carbohydrates and oxygen as major products. The true statement about photosynthesis is that water and carbon dioxide are reactants and GA3P and oxygen are products.
Step-by-step explanation:
In the chemical process of photosynthesis, water serves as a reactant. This means that in the presence of sunlight, carbon dioxide (CO2) and water (H2O) are converted to glucose (a sugar) and oxygen (O2). The general chemical equation for photosynthesis is 6CO2 + 6H2O + energy → C6H12O6 + 6O2. The primary function of water in this process is to provide electrons and hydrogen ions but also to produce oxygen as a byproduct.
As for the question about the true statement regarding photosynthesis, option d, which claims that water and carbon dioxide are reactants and glycerate 3-phosphate (GA3P) and oxygen are products, is true. Meanwhile, chlorophyll is the molecule that absorbs the energy of a photon in photosynthesis. Lastly, the two major products of photosynthesis are sugars/carbohydrates and oxygen.