Photosynthesis provides plants with glucose, which is a type of sugar that serves as their primary source of energy.

Here's a breakdown:

* Light energy from the sun is captured by chlorophyll in plant leaves.

* This energy is used to convert carbon dioxide from the air and water from the soil into glucose (sugar) and oxygen.

* The plant uses the glucose for growth, reproduction, and all its daily functions.

So, photosynthesis is essentially the process by which plants "eat" and get the energy they need to survive!