Biotic components are the living components of the environment that affect ecological functions. The physical and chemical non-living factors in an environment are termed abiotic factors.
Examples of biotic factors are plants, animals and fungi. Examples of abiotic factors are light, temperature, soil, water, pressure etc.
(Things that were once living but now dead are usually considered biotic components rather than abiotic components e.g. spilled blood, corpse etc. But body waste such as feces, urine (and of course carbon dioxide, oxygen, and water from respiration) are considered part of the abiotic component since it was never living in that decomposed form.)