1. Photosynthesis:

* Producers (autotrophs): Plants, algae, and some bacteria are able to harness energy from sunlight. Through photosynthesis, they convert light energy into chemical energy stored in the bonds of glucose (a sugar). This process uses carbon dioxide and water as raw materials and releases oxygen as a byproduct.

2. Cellular Respiration:

* Consumers (heterotrophs): Animals, fungi, and most bacteria obtain energy by consuming other organisms. They break down the food they consume (which originated from producers or other consumers) through cellular respiration. This process uses glucose and oxygen to release energy, producing carbon dioxide, water, and ATP (adenosine triphosphate), the primary energy currency of cells.

Here's a summary:

| Type of Organism | Energy Source | Process |

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

| Producers (autotrophs) | Sunlight | Photosynthesis |

| Consumers (heterotrophs) | Other organisms | Cellular respiration |

Important Note: While most organisms get their energy directly or indirectly from the sun, there are a few exceptions, like organisms living in deep-sea hydrothermal vents, which use chemosynthesis to obtain energy from inorganic compounds.