WILL GIVE BRAINIST Question 1 Only
Years after the lava from an erupting volcano destroyed an area, lichens started to grow in that area. These were gradually replaced by grasses, shrubs, conifers, and finally by a deciduous forest. In this sequence of events, the lichens functioned as What?

(Answer if you know.)

A. primary consumers

B. abiotic factors

C. pioneer organisms

D. climax organisms