What is the meaning of pen and coop?

Question

am helping my son's homework. pl help

Answer 1

a pen would hold a larger animal and a coop would hold poultry, like chickens.  they're pretty much the same.  

Answer 2

a pen holds sheep and goats a coop is a smaller encloser for hen and chickens

Answer 3

pen is where sheep stays

coop is where hen stays