A pan is used for cooking food by heating food in it on a stove.
An oven, stove, and microwave are available to keep food warm or to heat it up.
A pan is used to keep food warm or to heat it up.
A what is used to keep food warm or to heat it up?
Options:
(a) heat
(b) gas
(c) pan
(d) foil
(e) freezer
(f) fur
(g) bag
(h) jacket