A woodland was felled, stripped of its existing vegetation, and left to undergo secondary succession. Which factor in this situation is different from primary succession and ensures that secondary succession occurs more rapidly than primary succession does?
O Seeds and roots remaining in the soil can rapidly regenerate the vegetation.
O Animals from surrounding areas can move in and settle.
O Seeds will blow in from surrounding areas to regenerate the vegetation.
O Early-colonizing plants in secondary succession will all be perennials.
O Animals from surrounding areas can carry in seeds and other vegetation.