Autotroph

Autotroph (Tree)

Autotrophs are organisms that serve as primary producers, meaning they are consumed by heterotrophs to provide energy to the rest of the food chain. The way they obtain energy is by either photosynthesis or oxidation. Respectively, they are divided into photoautotrophs and chemoautotrophs. Trees fall into the category of photoautotrophs because they are able to transform CO2 in the air using the sunlight into oxygen and other nutrients for itself.