(big) animal in the world.
The blue whales are the biggest animals in the world.
(slow) animal in the world.
Sloths are the slowest animals in the world.
Dung Beetle (strong) animal in the world.
Dung Beetle is the strongest animal in the world.
(tall) animal in the world.
Giraffes are the tallest animals in the world.
(funny)
The penguins are funnier than the polar bears.
(dangerous) animal in the world.
The hippos are the most dangerous animals in the world.
(tall)
The ostriches are taller than the zebras.
... (fast) animals in the world.
The cheetahs are the fastest animals in the world.
(fast)
The birds are faster than the aligator.
(slow)
The tortoises are taller than the rabbits.
(strong)
The gorillas are stronger than the orangutans.
(dangerous)
The snakes are more dangerous than the foxes.