Answer:
Hawks and foxes
Rabbits and squirrels
Snakes and owls
Insectivorous birds and toads
Spiders and Predaceous insects
Explanation:
Hawks and Foxes: Both eat rabbits, squirrels, mice, seed-eating and insectivorous birds. They compete for food.
Spiders and Mice: Share no food. Do not compete.
Rabbits and Squirrels: Both eat grass. They compete for food.
Snakes and Owls: Both eat seed-eating and insectivorous birds. They compete for food.
Insectivorous birds and Toads: Both eat predaceous insects. They compete for food.
Spiders and Predaceous insects: Both eat herbivorous insects. They compete for food.
Hawks and Herbivores insects: Share no food. Do not compete.