Here's a breakdown:

* Autotrophs: These organisms use energy from their environment, like sunlight, to create their own food through processes like photosynthesis. They are the base of most food chains.

Examples of autotrophs include:

* Plants: They use sunlight to make sugars through photosynthesis.

* Algae: They also photosynthesize.

* Some bacteria: Some bacteria use chemical reactions to make food, a process called chemosynthesis.

Let me know if you have any more questions!