any living thing

nonliving

living organism and products of living organisms

one single organism

all the individuals of one kind in a specific area at one time

all the interacting populations in a specific area

harmful

any biotic or abiotic part of an ecosystem that controls the size of the population

organisms that are not native to an ecosystem that have a negative impact

A species that normally lives and thrives in a particular ecosystem

the equalibrium or balance of the internal systems in an organism

who's better ??