Hello Luke,
Just for suplementing the Nyord and Франк contributions, when the answer is Yes or No, the question (close-ended question) can be : "Est-ce que tu aimes le chocolat ? Oui."
If the answer is a thing or anything else (except yes or no), the question (open question) can be :
"Qu'est-ce que tu aimes manger ? (J'adore) le chocolat."