Answer:
Autotrophs
Step-by-step explanation:
Autotrophs are the only type of organism that produce energy for other organism.
However, there are different types of autotrophs that do 2 different things to produce their food.
First off, autotrophs are made up of fungi, algae, bacteria, and more commonly, plants.
They produce their own food two different ways,
The first way, and most commonly known, is photosythesis.
This is where a mix of carbon dioxide, water, and sunlight undergo 2 complex proccess to make glucose.
This is the energy that consumers, known as heterotrophs take from the autotrophs.
The second and less commonly known way of producing food is chemosythesis.
In chemosytrhesis, carbon dioxide or methane which is transformed into nutrients through the oxidization of things such as hydrogen gas and hydrogen sulfure, whihc are mainly found deep in the ocean in hydrothermal vents.
So, to answer your question:
Autrophs produce their own energy
Or more specific:
Plants, fungi, bacteria, and algae produce their own energy.
Hope this helps! :)