Why do plants need sunlight?
Show answer & explanation
Answer: For photosynthesis to make food
To stay warm — Wrong. While sunlight provides warmth, plants don't need it primarily for temperature. They need light energy for photosynthesis to create their own food.
For photosynthesis to make food ✓ — Correct! Plants use sunlight as energy for photosynthesis - a process where they convert carbon dioxide and water into glucose (sugar) and oxygen. This happens in chloroplasts using chlorophyll. Without sunlight, plants can't make food and will eventually die. Light is literally their energy source!
To grow taller — Wrong. While plants do grow toward light, they don't need sunlight just to grow taller. They need light energy for photosynthesis to create the sugars that fuel all growth processes.