The type of organism that uses chemical energy to produce food is called a chemoautotroph.

Here's why:

* Autotroph: This means they can produce their own food.

* Chemo: This indicates that they use chemicals as their energy source.

Examples of chemoautotrophs:

* Bacteria: Many bacteria, like those found in deep sea vents, use hydrogen sulfide (H2S) or other inorganic molecules as their energy source.

* Archaea: Similar to bacteria, certain archaea also use chemicals like methane or ammonia for energy.

Let me know if you'd like to know more about chemoautotrophs!