why are lichens a good pioneer species after a volcanic eruption?\no they are able to grow on moist soil.\no…

Brief Explanations:

After a volcanic eruption, the area is often left with bare rock. Lichens are good pioneer species as they can grow on bare rock. They secrete acids that break down rock, starting the process of soil - formation. They don't require pre - existing soil, and their ability to grow in harsh, barren conditions makes them ideal for the early stages of succession after a volcanic eruption.

Answer:

They are able to grow on bare rock.