- Photosynthesis is a kind of chemical process
- If something is required by a living thing to perform a process then that living thing uses that something to perform that process
- Therefore, if something is required by a living thing to perform photosynthesis then that living thing uses that something to perform photosynthesis

- If something is required by a living thing to perform photosynthesis then that living thing uses that something to perform photosynthesis
- A plant requires sunlight for photosynthesis
- Therefore, a plant uses sunlight for photosynthesis

- A plant uses sunlight for photosynthesis
- Photosynthesis makes food for the plant by converting carbon dioxide, water, and sunlight into carbohydrates
- So, a plant uses sunlight for photosynthesis to make food

- Light is a kind of energy
- Sunlight is a kind of light
- Therefore, sunlight is a kind of energy

- A plant uses sunlight for photosynthesis to make food
- Sunlight is a kind of energy
- Hence, sunight is a kind of energy that plants use to make food

So, sunight is a kind of energy that plants use to make food
Question: Plants transform energy when they make their own food. Which type of energy is used by plants for making food?
Context: - Photosynthesis is a kind of chemical process 
- A plant requires sunlight for photosynthesis 
- If something is required by a living thing to perform a process then that living thing uses that something to perform that process 
- Light is a kind of energy 
- Sunlight is a kind of light 
- Photosynthesis makes food for the plant by converting carbon dioxide, water, and sunlight into carbohydrates