Practice question

A prey type with larger E/h provides more energy for each unit of handling time and is ranked above a lower-profitability type. On encounter, prey 1 should therefore be accepted because rejecting it to search for prey 2 would replace a superior immediate opportunity with an inferior one. The abundance of prey 1 influences whether the predator should broaden its diet to include prey 2, but it does not normally make the predator reject prey 1. Saying prey 2 is always ignored is too strong: when preferred prey become rare and search time rises, including the lower-ranked type may increase total intake rate. The ranking guarantees acceptance of prey 1, not permanent exclusion of prey 2. This reasoning connects organismal behavior with broader ecological consequences. A mechanism that changes encounter rates, resource use, or reproductive success can scale up to alter population trajectories and the structure of species interactions. The alternatives can be separated by asking what changes for each participant and which process causes that change. That approach is more reliable than treating familiar examples as fixed labels, because many interactions shift with environmental context.