The given diagram represents information about the food chain of an owl. The first stage involves the producers and flowers have been given as an example. These are then consumed by a caterpillar, which in the subsequent stage and consumed by frog which is the secondary consumer. Furthermore, snake consumed frog. The ultimate consumer in this food chain is an owl, which consumes the frog. Overall. It can be said that all the organisms play a vital role in a food chain.