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Organisms that can capture energy from sunlight or chemicals and use that energy to produce food are called autotrophs, or primary producers. The process in which autotrophs capture light energy and use it to convert carbon dioxide and water into oxygen and sugars is called photosynthesis.rganisms that can capture energy from sunlight or chemicals and use that energy to produce food are called autotrophs, or primary producers. The process in which autotrophs capture light energy and use it to convert carbon dioxide and water into oxygen and sugars is called photosynthesis.
The organisms at the beginning of the food chain are called producers or autotrophs, such as plants and algae. Some make their own food using the sun's energy through photosynthesis and some producers use chemosynthesis to make their own food. Above them would be 1st level consumers, then 2nd level consumers and so on.