How do photoautotrophs make energy?
Answer
They convert carbon dioxide, water, and inorganic compounds into carbohydrates.
They covert carbon dioxide, water, and sunlight into carbohydrates.
They convert carbon dioxide, water, and organic molecules to carbohydrates.
They convert carbon dioxide, sunlight, and organic molecules to carbohydrates.

Question

How do photoautotrophs make energy?
Answer
		They convert carbon dioxide, water, and inorganic compounds into carbohydrates.
		They covert carbon dioxide, water, and sunlight into carbohydrates.
		They convert carbon dioxide, water, and organic molecules to carbohydrates.
		They convert carbon dioxide, sunlight, and organic molecules to carbohydrates.

aroub · Answer

I think it's this one : They convert carbon dioxide, water, and sunlight into carbohydrates.

kainui · Answer

Photo- means light
Auto- means self
-troph means feed

Put it all together and you have light self-feeder. All autotrophs are self-feeders as opposed to heterotrophs (other feeder) like humans that have to eat plants to survive. Plants can feed themselves with just light and live without eating any other organisms. So we know that they use light, and no organic molecules to create food. CO2 and H2O are two inorganic substances and that gives you your answer!