Question

Lichens, which are capable of initiating ecological suecession even on a bare rock

Answer 1

The correct answer is algae and fungi.

...

Lichens are indicators of air pollution, water pollution, heavy metals as well as radioactive particles.

The study of lichens is called Lichenology.

Lichens are capable of initiating ecological succession even on a bare rock,

Lichens are called pioneer colonizers of bare rock.