which of the following could result in secondary succession?\n the formation of a tall sand dune on a…

which of the following could result in secondary succession?\n the formation of a tall sand dune on a previously grassy beach\n a vast glacier in motion forming a u - shaped valley in its wake\n a volcanic eruption that covers most of what used to be a forest\n an introduced species that destroys all the native plants in an area
Answer
Brief Explanations:
Secondary succession occurs in an area where a community that already existed has been disturbed. An introduced species destroying native plants is a disturbance to an existing community. Formation of a sand - dune, glacier action, and volcanic eruption are more related to primary succession as they start in areas with little or no existing soil or life.
Answer:
an introduced species that destroys all the native plants in an area