Two interactions within an ecosystem are predation and parasitism. In predation, predator organisms feed on prey organisms. In parasitism, parasites depend on host organisms. Which of the following correctly describes the relative numbers of organisms in parasitism or predation?
-The number of parasites is usually greater than the number of host organisms.
-The number of predators is usually greater than the number of prey organisms.
-The number of parasites is always equal to the number of host organisms.
-The number of predators is always equal to the number of prey organisms.
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