Here's a breakdown:

* Autotroph: An organism that can produce its own food from simple inorganic molecules. They are the primary producers in an ecosystem.

* Inorganic molecules: These are molecules that do not contain carbon and hydrogen atoms bonded together (examples include water, carbon dioxide, and minerals).

There are two main types of autotrophs:

* Photoautotrophs: These organisms use sunlight as their energy source to produce food through photosynthesis (like plants, algae, and some bacteria).

* Chemoautotrophs: These organisms obtain energy from the oxidation of inorganic compounds (like hydrogen sulfide, ammonia, or methane) to produce food (like some bacteria found in deep-sea vents).

Let me know if you'd like to know more about autotrophs or their specific types!