Plants:

* Photosynthesis: Plants are autotrophs, meaning they produce their own food. They use sunlight, water, and carbon dioxide to create glucose (sugar) through the process of photosynthesis. This glucose is their primary source of energy.

* Energy storage: Plants store excess energy as starch within their cells, which can be broken down later for energy.

Animals:

* Heterotrophy: Animals are heterotrophs, meaning they get their energy from consuming other organisms.

* Cellular respiration: Animals break down the organic molecules (like carbohydrates, fats, and proteins) obtained from their food through a process called cellular respiration. This process releases energy stored in the food molecules in the form of ATP (adenosine triphosphate), the main energy currency of cells.

Here's a simplified table summarizing the key differences:

| Feature | Plants | Animals |

|---|---|---|

| Energy source | Sunlight | Other organisms |

| Process | Photosynthesis | Cellular respiration |

| Food production | Autotrophs (make their own food) | Heterotrophs (consume other organisms) |

In summary:

* Plants capture energy from the sun and convert it into chemical energy (glucose) through photosynthesis.

* Animals obtain energy by consuming plants or other animals, then breaking down the food molecules for energy through cellular respiration.

Both processes are essential for the flow of energy within ecosystems. Plants are the foundation of most food webs, producing energy that is then passed on to animals.