They all require the same type of food. They are part of a community. They are abiotic factors in a forest. The diagram below represents a food web. Foxes, snakes, and sparrows are secondary consumers.
Snakes eat grass, grasshoppers, and frogs.
Rabbits, mice, and grasshoppers contain the greatest amount of stored energy. Sparrows and hawks are omnivores. Humans often have not given much thought to the long-term impacts of technological change. As the 20th. Century comes to a close, most scientists would agree that humans should use knowledge of ecology to consider the needs of future generations of humans and other species.