Which type of feeder consumes nectar as its main food source?

The correct answer is nectarivore, as this term specifically describes organisms that primarily feed on nectar, the sugary fluid produced by flowers. These feeders have evolved specific adaptations to extract nectar efficiently, such as elongated mouthparts or specialized tongues. Nectarivores play a critical role in pollination, as they transfer pollen from one flower to another while feeding, facilitating plant reproduction.

In contrast, detritivores consume decomposing organic matter, including dead plants and animals, and contribute to nutrient recycling. Hematophagy refers to the consumption of blood, which is characteristic of certain parasites like mosquitoes and ticks. Herbivores primarily feed on plant material but do not specifically target nectar as their main food source. Therefore, nectarivore is the most precise and appropriate term for an organism that specializes in feeding on nectar.