Question

Snakes bite and hiss, Buts crocs bite, too, You must face a foe what am i?

Answer 1

The answer to this riddle is "danger."

Both snakes and crocodiles are dangerous animals that can harm humans with their bites. The riddle is suggesting that danger can come from unexpected sources and one must always be prepared to face a foe, no matter what form it takes

Answer 2

The answer to this riddle is "fear". Snakes and crocodiles are both feared for their bites and hissing, but in this riddle, they represent different types of fear.