A volcanic eruption can cause a primary disturbance in an ecosystem. What
is a primary disturbance?
A. A progressive series of changes that take place in an area where
nothing had been living
B. A progressive series of changes that take place in an area where a
community is living
C. An event that removes most of the organisms and soil from an
area
D. An event that removes most of the organisms that live
aboveground
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