Is a red fox autotroph?

No, a red fox is not an autotroph. Autotrophs are organisms that can synthesize their own food from inorganic molecules, using energy from the sun or from chemical reactions. Red foxes are heterotrophs, meaning that they must consume other organisms in order to obtain energy and nutrients. Red foxes are carnivores, and their diet primarily consists of small rodents, rabbits, birds, and insects.