Here's a breakdown:

* Autotrophs: These organisms make their own food from inorganic sources. They can be photoautotrophs (like plants) which use sunlight, or chemoautotrophs which use chemical energy.

* Heterotrophs: These organisms get their food by consuming other organisms. They can be chemoheterotrophs which use chemical energy from consuming organic matter, or photoheterotrophs which use light for energy but still need to consume organic compounds.

Chemotrophs specifically use the energy stored in chemical bonds of molecules. Here are some examples:

* Chemoorganotrophs: These organisms use organic compounds (like sugars, fats, or proteins) as their energy source. Many bacteria and fungi are chemoorganotrophs.

* Chemolithotrophs: These organisms use inorganic compounds (like hydrogen sulfide, ammonia, or iron) as their energy source. Some bacteria and archaea are chemolithotrophs.

Key difference:

* Phototrophs: Use light energy.

* Chemotrophs: Use energy from chemical compounds.

Let me know if you'd like more details on any specific type of chemotroph!