Final answer:
Photosynthesis is the process by which plants use sunlight to synthesize food from carbon dioxide and water. It is essential for the survival of plants and is often considered the most important life process on Earth.
Step-by-step explanation:
Photosynthesis is the process by which green plants use sunlight to synthesize food from carbon dioxide and water. During photosynthesis, solar energy combines with carbon dioxide and water to produce glucose, a carbohydrate, and oxygen. This process is essential for the survival of plants and is often considered the most important life process on Earth.