Answer:
Autotrophs convert water, carbon dioxide, and sunlight into carbohydrates.
Step-by-step explanation:
Autotrophs refer to those living organism which has the ability to prepare its own food. They have this unique feature due to the presence of green color pigment called chlorophyll. The food prepared by them is used by themselves as well as other living organisms.
The autotrophs make energy with help of substances such as carbon dioxide gas and water as making materials. In the presence of sunlight, the chlorophyll pigments convert the reactants into product which are nothing but carbohydrate and releases oxygen.