Answer: Iron because if you put wood, clay, or brick in it because the structure is not metal such as thermal conductivity. So the metal would make it cooler than wood because heat would burn would which means it would be hot.
Answer: The thermal energy transfer is When a fluid, such as air or a liquid, is heated and then travels away from the source, it carries the thermal energy along.
Explanation: heat transfer is called convection. hopefully this was helpful.