Here's a breakdown:

* Photosynthesis: This is the process where plants use sunlight, water, and carbon dioxide to create sugars (glucose).

* Sugars (glucose): These sugars are the plant's primary source of energy. They use this energy for growth, reproduction, and all their daily functions.

* Animals feed on plants: Animals consume plants to obtain these sugars. The sugars are then broken down in the animal's body to provide energy for their own survival and growth.

So, photosynthesis is the essential process that allows plants to create the food that animals rely on for their survival.