Photosynthesis is the process by which green plants make their own food using sunlight, carbon dioxide, and water.ExplanationPlants use sunlight as energy.They take in carbon dioxide (CO₂) from the air and water (H₂O) from the soil.Using the chlorophyll in their leaves, they convert these into glucose (sugar) and oxygen (O₂).Photosynthesis FormulaCarbon dioxide + Water + Sunlight → Glucose + Oxygen 6CO₂ + 6H₂O + sunlight → C₆H₁₂O₆ + 6O₂Why It’s ImportantPlants get food through photosynthesis.Oxygen is released into the air — which humans and animals need to breathe.It helps keep the balance of gases in the atmosphere.