Why is roasting a marshmallow considered conduction?

Roasting a marshmallow should actually be considered *convection*, not conduction.

Convection is the transfer of heat by the movement of a fluid when the heated fluid rises and the cooled fluid sinks.

In the case of roasting a marshmallow, the heat from the fire rises and directly transfers to the surface of the marshmallow, heating the marshmallow without direct contact.