Questions: 9. Simple sugar 10. Organelle where photosynthesis occurs 14. Plants need carbon to make food. 15. Source of energy for photosynthesis

To address the questions provided:

9. Simple sugar: The answer is glucose. Glucose is a simple sugar that is a primary product of photosynthesis and serves as an essential energy source for plants and other organisms.

10. Organelle where photosynthesis occurs: The answer is chloroplast. Chloroplasts are the organelles in plant cells where photosynthesis takes place. They contain chlorophyll, which captures light energy to convert carbon dioxide and water into glucose and oxygen.

11. Plants need carbon to make food: The answer is true. Plants require carbon, which they obtain from carbon dioxide in the atmosphere, to produce glucose through the process of photosynthesis. This glucose serves as food and energy for the plant.

12. Source of energy for photosynthesis: The answer is sunlight. Sunlight provides the energy needed for photosynthesis, allowing plants to convert carbon dioxide and water into glucose and oxygen.

In summary, glucose is the simple sugar produced in photosynthesis, chloroplasts are the organelles where photosynthesis occurs, plants need carbon to make food, and sunlight is the source of energy for photosynthesis.