Exercise 9 of the book ¡SUPERLATIVES!

1 penguins, ostriches, falcons (large)

  Ostriches are the largest.
  The Falcons are small.

2 horses, giraffes, lions (tall)
 
  Giraffes are the tallest.
  Lions are shorter.

3 tigers, sheep, foxes (aggressive)

  Tigers are aggressive.
  Sheep are quiet.

4 tigers, lions, cheetahs (fast)

  Cheetahs are the fastest.
  Lions are slower.

5 hippos, gorillas, elephants (big)

  Elephants are the biges.
  Gorillas are the smallest.

6 buffaloes, wolves, bears (heavy)

  The buffaloes are heavies.
  The wolves are lighter.