What is the difference between a organism and a biotic factor.

Thank you so much, this is hard for me.

it two different words to describe something living. Each has its own definition:

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.
Organism; an individual animal, plant, or single-celled life form
so organisms are also (usually) a biotic factor in an ecosystem, or several ecosystems