Which of these statements is true about autotrophs, but not heterotrophs? they use sugar and oxygen to make carbon dioxide and water. they use chlorophyll and oxygen to make carbon dioxide and water. they use sunlight, water, and carbon dioxide to make sugars. they use sunlight, water, and oxygen to make chlorophyll.

The statement that is true for autotrophs but not heterotrophs is they use sunlight, water and carbon dioxide to make sugars. This process is known as photosynthesis and relies on the presence of a green pigment called chlorophyll. Autotrophs are usually at the bottom of the food chain and serve to introduce energy into the ecosystem by converting light energy to chemical energy.