* Plants: Trees, flowers, grasses, etc.
* Animals: Mammals, birds, insects, fish, etc.
* Fungi: Mushrooms, molds, yeasts, etc.
* Bacteria: Microscopic single-celled organisms.
* Viruses: Non-living entities that require a host to reproduce.
In ecological terms, "biotic factors" are the living components of an ecosystem that influence other organisms and their environment.
Here are some examples of biotic factors:
* Predation: A wolf hunting a deer.
* Competition: Two species of birds vying for the same food source.
* Parasitism: A tapeworm living inside a dog's intestines.
* Mutualism: A bee pollinating a flower.
* Decomposition: Bacteria breaking down dead leaves.
The term "biotic" contrasts with "abiotic," which refers to non-living components of an ecosystem, such as water, air, sunlight, and rocks.