Predation, parasitism, herbivory are examples of

• A. Density-Dependent Factors
• B. Density-Independent Factors
• C. Symbiosis
• D. Exploitative Interaction

Answer: (D)

The main idea here is how species interact in ways that benefit one side at the expense of the other. Predation, parasitism, and herbivory are all exploitative interactions: one species gains resources or energy while the other pays a cost. A predator eats and kills prey, a parasite siphons resources from its host over time, and a herbivore consumes plant tissue, often reducing the plant’s fitness. These relationships are about consumer-resource dynamics, not about how population size changes with density. They aren’t described by density-dependent or density-independent factors, which focus on population growth responses rather than the nature of the interaction itself. And while parasitism is a form of symbiosis, predation and herbivory aren’t typically labeled as symbioses; the common thread tying these together is the exploitative, one‑sided benefit.