Compare them.
The girafes are taller than the zebras.
Compare them.
The kangaroo is faster than the koala.
Compare them.
The crocodile is bigger than the bird.
Compare them.
The wolf is bigger than the fox.
The cheetah is the ..... (fast) on Earth.
fastest
... is the ..... (big) on land.
The elephant ..... biggest ...
Compare them.
The cat is smaller/friendlier than the dog.
Compare them.
The snake is longer than a spider.
Compare them.
The sea lion is bigger than the penguin.
Compare them.
The lion is smaller than the hippo.
Compare them.
The panda is cuter than the gorilla.