Why do foxes indirectly depend on plants for their food?

Foxes indirectly depend on plants for their food because they are carnivorous animals that rely on a variety of prey, many of which are herbivores. These herbivores, such as rabbits and rodents, primarily feed on plants. By consuming these animals, foxes are ultimately benefiting from the energy stored in the plants that their prey have eaten, creating an indirect dependency on plant life for their sustenance.