Question

Why are human disturbances often of more concern than natural disturbances?
a. Human disturbances last much longer than natural disturbances so that a damaged ecosystem may have little or no chance of recovery.
b. Human disturbances are stronger than natural disturbances and so the recovery needed is much greater.
c. Human disturbances often cover much wider areas than natural disturbances, which means that more ecosystems are affected.
d. Human disturbances affect all types of ecosystems, whereas natural disturbances are limited to certain types of ecosystems.

Answer 1

i think (d.)