Sure! Here are the comparisons for the prompts you provided:
FAST
Cheetahs are faster than leopards.
Wolves are the slowest of all.LONG TAIL
Giraffes have longer tails than dogs.
Monkeys have the longest tails of all.DANGEROUS
Lions are more dangerous than leopards.
Crocodiles are the most dangerous of all.SHARP CLAWS
Cats have sharper claws than dogs.
Koalas have the least sharp claws of all.
Let me know if you need anything else!