The organisms responsible for converting raw energy into usable chemical energy are collectively called autotrophs.

Here's why:

* Autotrophs are organisms that can produce their own food from inorganic sources.

* They use energy from the environment to synthesize organic compounds (like sugars) from simple inorganic molecules.

* This process is called primary production and is essential for life on Earth.

The most common types of autotrophs are:

* Photoautotrophs: These organisms use light energy, like plants and algae, through photosynthesis.

* Chemoautotrophs: These organisms use chemical energy, like certain bacteria, through chemosynthesis.

Let me know if you'd like to learn more about autotrophs or the processes of photosynthesis and chemosynthesis!