Ответ:

Here are the corrected sentences:

  1. Cats are more popular than snakes as pets.
  2. Pigs are more intelligent than other animals.
  3. Turtles are slower than crocodiles.
  4. Elephants are heavier than pigs.
  5. Bears are rarer than snakes.

Matching the words:

1. jar a) bread
The words don't match, jar is a container and bread is food.