Predators and Prey:
  Lion eats Zebra
  Zebra eats Grass

Apex Predators: Lion
Producers: Grass
Most Flexible Eaters: Lion and Zebra
Tastiest: Grass and Zebra

Heights:
  Grass: 0
  Lion: 2
  Zebra: 1

For an A+:
  Herbivores: Zebra
  Omnivores: (None)
  Carnivores: Lion