1) Snakes are more dangerous than dogs. Tarantulas are the most dangerous of all. 2) Sharks are more intelligent than goldfish. Dolphins are the most intelligent of all. 3) Dogs are more popular than hamsters. Cats are the most popular of all. 4) Goldfish are more beautiful than iguana. Parrots are the most beautiful of all. 5) Cats are more expensive than hamsters. Horses are the most expensive of all. 6) Collies are better guard dogs than poodles. Alsatians are the best guard dogs of all.