- Green plants perform photosynthesis to provide food for themselves
- Food is a source of energy for plants
- Therefore, green plants perform photosynthesis to provide energy for themselves

- A source of something produces that something
- Photosynthesis is a source of energy for the plant by converting carbon dioxide, water, and sunlight into carbohydrates
- So, photosynthesis produces energy by converting carbon dioxide, water, and sunlight into carbohydrates

- Photosynthesis is a kind of chemical process
- If a process produces a thing by converting something into something else then that process produces that thing from that something
- So, if photosynthesis produces a thing by converting something into something else then that photosynthesis produces that thing from that something

- Photosynthesis produces energy by converting carbon dioxide, water, and sunlight into carbohydrates
- If photosynthesis produces a thing by converting something into something else then that photosynthesis produces that thing from that something
- So, photosynthesis produces energy from sunlight

- Green plants perform photosynthesis to provide energy for themselves
- Photosynthesis produces energy from sunlight
- So, green plants produce energy from sunlight

- Green plants produce energy from sunlight
- Grass is a kind of green plant
- Hence, grass produces energy from sunlight

- "A dwarf planet usually is much smaller in size / in mass than other planets " is not a useful statement here

Hence, grass produces energy from sunlight
Question: Which of the following organisms produces energy from sunlight?
Context: - Photosynthesis is a kind of chemical process 
- Grass is a kind of green plant 
- Green plants perform photosynthesis to provide food for themselves 
- A source of something produces that something 
- If a process produces a thing by converting something into something else then that process produces that thing from that something 
- Photosynthesis is a source of energy for the plant by converting carbon dioxide, water, and sunlight into carbohydrates 
- Food is a source of energy for plants
- A dwarf planet usually is much smaller in size / in mass than other planets 