Question

this image shows lichens and mosses on a rock. which type of succession is taking place here? tertiary primary eutrophic

Explanation:

Primary succession occurs in lifeless areas where soil has not yet formed. Lichens and mosses colonizing a rock (a bare, inorganic substrate) are typical pioneer species in primary succession. Tertiary succession is not a standard ecological succession type. Eutrophic refers to nutrient - rich water bodies (not related to this rock - colonizing scenario). So, the type of succession here is primary.

Answer:

primary