Question

a fire is burning in a fireplace. where is the conduction?
you turn on the blowers to circulate warm air.
fire is warming the bricks beneath it.
heat is rising up the chimney.

Explanation:

Conduction is the transfer of heat through direct contact. When the fire warms the bricks beneath it, there is direct physical contact between the fire (hot source) and the bricks (material being heated). Blowing warm air is convection (movement of fluid - air in this case). Heat rising up the chimney is also convection as hot air (a fluid) is moving upwards.

Answer:

Fire is warming the bricks beneath it.