Tertiary consumers are animals that eat primary consumers and secondary consumers. Think of tertiary consumers that eat both plants and animals, basically they are omnivores. D would be the thrush since the cat is a natural predator and the other consumers are natural vegetarians
Decreased surface-to-volume ratio. The dolphin's fusiform body shape and reduced limb size decrease the amount of surface area exposed to the external environment.
Increased insulation. Dolphins deposit most of their body fat into a thick layer of blubber.
