Answer:
Plants.
Step-by-step explanation:
Autotroph organism are the organism that has the ability to produce their own food. Some examples are autotrophic organism are some bacteria and plants.
Plants prepare their own food by the process of photosynthesis. They uses sunlight, water, carbon dioxided and soil to produce their food and store them also. The oxygen is also produced in the process of photosynthesis.
Thus, the correct answer is plamts.