What does it mean to be a biotic factor

Definition. noun, plural: biotic factors. A factor created by a living thing or any living component within an environment in which the action of the organism affects the life of another organism, for example a predator consuming its prey.

Biotic factors are the living components of an ecosystem. They are sorted into three groups: producers or autotrophs, consumers or heterotrophs, and decomposers or detritivores.

b. is the answer hoped i        

i believe the answer is three water molecules