Keystone species: a) occur only in intertidal zones. b) play an unusually important role in…

Keystone species:

a) occur only in intertidal zones.
b) play an unusually important role in determining the species composition in a
habitat. c) can be removed from a habitat without any impact on the remaining
species in the community. d) are producers and therefore usually are plants. e)
are more expendable than commensal species, from a conservation perspective.