Any one know what crawfish is?

It's another name for crayfish, a type of crustacean

Crayfish are freshwater crustaceans resembling small lobsters. In some parts of the United States, they are also known as crawfish, craydids, crawdaddies, crawdads, freshwater lobsters, mountain lobsters, mudbugs, or yabbies. Taxonomically, they are members of the superfamilies Astacoidea and Parastacoidea

Explanation:

hope this helps you thank

b europeans take corn to africa. corn becomes an important crop there.