Lichens, which are capable of initiating ecological succession even on a bare rock, are actually a symbiotic association of __:
[A]algae and bacteria
[B]algae and fungi
[C]bacteria and fungi
[D]fungi and mosses

algae and fungi
A lichen is a composite organism consisting of a fungus (the mycobiont) and a photosynthetic partner (the photobiont or phycobiont) (usually algae) growing together in a symbiotic relationship.