Biotic - A living factor, Abiotic - A non-living factor, Ecosystem - A community of interacting organisms, Competition - A fight for resources, Producer - Organisms that make their own food, Consumer - Organisms unable to make their own food, Predator - Organism that preys on other animals, Nitrogen - Makes up 78% of the atmosphere, Parasite - An organism that lives on or in a host, Decomposer - Organisms that feed on dead or decaying material,

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