Abiotic Factor: non-living conditions which can influence where plants or animals live.
Biotic Factors: the living parts of an ecosystem.
Ecosystem: a community of living organisms.
Habitat: the natural environment for a organism.
Organism: an individual plant or animal.
Population: all the inhabitants of a town, area, or country.
Community: a group of people that live in the same area.
Classification: the act or process of classifying something.
Taxonomy: the branch of science concerned with classification.