1. Photosynthesis: Rice plants, like all plants, use sunlight, water, and carbon dioxide to create their own food (glucose) through photosynthesis. This glucose is a form of chemical energy.

2. Storage: The rice plant stores this energy in the form of starch within its grains.

3. Consumption: When we eat rice, we ingest these starch granules.

4. Digestion: Our digestive system breaks down the complex starch molecules into simpler sugars, primarily glucose.

5. Absorption: The glucose is absorbed into our bloodstream.

6. Cellular Respiration: Our cells use this glucose as fuel in a process called cellular respiration. This process breaks down glucose, releasing energy in the form of ATP (adenosine triphosphate).

7. Utilization: This ATP energy is used to power all of our bodily functions, from muscle movement and brain activity to growth and repair.

In summary:

* Rice is a source of chemical energy (starch).

* Our bodies convert this chemical energy into a usable form (ATP).

* ATP is used to power our life processes.

Important Note: Rice also provides other nutrients like vitamins and minerals, but the primary energy source is the carbohydrate (starch) it contains.