Aglae are aquatic organisms that use water, carbon dioxide, and sunlight to provide their own Energy Systems need to consume energy by eating algae and other organisms which of the following statements describe fish and algae? A- fish are autotrophs and aglae are heterotrophs B- fish and aglae are both heterotrophs C- fish and algae are both autotrophs D- fish are heterotrophs and aglae are autotrophs