Final answer:
The primary product of photosynthesis is glucose (C6H12O6), which serves as an energy source for plants. Oxygen is also produced as a byproduct.
Step-by-step explanation:
The main product of photosynthesis is glucose (C6H12O6), which is selected as option B in the given choices. Photosynthesis is a critical biological process that uses sunlight, carbon dioxide (CO2), and water (H2O) to produce carbohydrates and oxygen. Specifically, the equation for photosynthesis is represented as 6CO2 + 6H2O → C6H12O6 + 6O2, where glucose is the primary energy source for cells, and oxygen is a byproduct released into the atmosphere. Therefore, the correct answer to the student's question is B) Glucose (C6H12O6), which is essential for plant life as it provides them with the energy needed for growth and maintenance.