Question

which of these is an example of conduction? you burn your feet on the hot sidewalk. you sit near a campfire and feel warm. you stand in the sunshine and feel warm.

Explanation:

Conduction is the transfer of heat through direct contact. When you burn your feet on the hot sidewalk, heat is transferred from the sidewalk (a solid) directly to your feet (another solid) through contact. Sitting near a campfire (heat transfer via air currents - convection) and standing in sunshine (heat transfer via electromagnetic waves - radiation) are not conduction.

Answer:

You burn your feet on the hot sidewalk.