Of thee following factors that impact biodiversity, which one would be considered a micro-effect?

A. An invasive species of plant is introduced that outcompetes all local plants
B. A stand of aspen trees dies and decays, leaving a clearing in the forest
C. A hurricane destroys a coral reef
D. A forest is cleared for the construction of a suburban home division

B. A stand of aspen trees dies and decays, leaving a clearing in the forest