Define the role of the sun in providing energy for living things on earth?

Answer: The Sun is the major source of energy for organisms and the ecosystems of which they are a part. Producers, such as plants and algae, use energy from sunlight to make food energy by combining carbon dioxide and water to form organic matter. This process begins the flow of energy through almost all food webs

The sun provides us energy from a process called nuclear fusion

Explanation:

Fusion heats the sun so the sun can give us energy.