Answer:
It happens because the leaves trap the sunlight energy
Step-by-step explanation:
When the leaves trap this sunlight energy and combines with the carbon dioxide and water it goes through photosynthesis. This turns the sunlight energy and other resources it collects to energy (sugars) that the plant will use to grow and support itself. It then releases oxygen as a waste which is what humans use. We exhale carbon dioxide that the plants need so while they help us we also help them.