The question is basically asking what method of heat transfer is MOSTLY responsible for heating a pizza inside of a brick oven. So from what I understand, the majority of the heat is coming from conduction-through the bricks themselves. Since the questions states that there is a chimney ABOVE the oven, I figured I could rule out that it is heated at all by convection. However, isn't some of the heat coming from radiation, even if it is a minimal amount? Also, if the chimney was on the side of the fireplace, instead of the top, then the pizza could potentially be heated by all three methods of heat transfer....Right? OR....is the primary method of heat transfer radiation? I read on a brick oven webiste that their oven heats by radiation. I don't get how the bricks could be giving off radiation...and not by conduction. Please help! Thanks!