What is not an example of an area that is likely to undergo primary succession? a. a barnacle encrusted rock is exposed at low tide. b. a glacier begins to melt or move leaving exposed bare rock. c. a volcanic eruption leaves behind hardened lava flows. d. a landslide exposed bare rock

The correct option is A.
Succession refers to the process by which the structure of a particular biological community evolves over a period of time. There are primary and secondary succession. Primary succession usually occur in an area in which the soil is not capable of sustaining the growth of plants. The options B, C and D given in the questions are examples of primary succession. 

The answer is A! Hope This Helps!