Which of these is an example of herbivory?

Herbivory refers to the act of an organism consuming plants or plant-based material as its primary source of nutrition. The correct answer highlights a bird eating seeds from a tree, which is a direct interaction where the bird consumes part of a plant. This feeding behavior is a classic example of herbivory because it involves the ingestion of plant matter without killing the plant.

The other scenarios illustrate different feeding relationships. For instance, a lion preying on a zebra represents a predator-prey interaction, not herbivory, as the lion consumes an animal rather than a plant. A tick feeding on a deer is a form of parasitism, where the tick benefits at the expense of the deer. Finally, a bee pollinating a flower describes a mutualistic relationship where both the bee and the flower benefit, but it does not involve the bee consuming plant matter in a way that would qualify as herbivory.