which of the following could result in secondary succession?\no the formation of a tall sand dune on a…

which of the following could result in secondary succession?\no the formation of a tall sand dune on a previously grassy beach\no a vast glacier in motion forming a u - shaped valley in its wake\no a volcanic eruption that covers most of what used to be a forest\no an introduced species that destroys all the native plants in an area
Answer
Brief Explanations:
Secondary succession occurs in an area that has had previous plant - life and is disturbed. An introduced species destroying native plants is a disturbance in an already - established ecosystem. Formation of a sand dune, glacial action, and volcanic eruption are more related to primary succession as they create new substrates or completely destroy the previous ecosystem to a bare - rock or similar state.
Answer:
an introduced species that destroys all the native plants in an area