The ecological role of herbivores in a food web is integral to energy transfer and nutrient cycling. Herbivores, as primary consumers, feed on plants (producers), converting the energy stored in plant matter into forms usable by higher trophic levels, such as carnivores. By consuming vegetation, herbivores help regulate plant populations, promote biodiversity, and contribute to soil health through their waste. Their presence is key to maintaining balance within ecosystems, facilitating energy flow, and supporting various species interactions.