Final answer:
Convection is the correct answer as it involves the movement of air, where cool air enters through one window and warm air exits through another, enabling heat to be transferred within the room.
Step-by-step explanation:
When you open two windows allowing cool air to enter and hot air to exit, this is an example of convection. Convection is the heat transfer by the macroscopic movement of a fluid, which in this case is the air. As the cooler, denser air comes into the room, it displaces the warmer, less dense air, which rises and exits. This process is different from conduction, which is the transfer of heat through a material without the movement of the material itself.
An everyday example of convection is a forced-air furnace system in a home. In this system, air is heated and then circulated through the home, transferring heat by the movement of the warmed air. Another example is weather systems, where large-scale convection results in the formation of various weather patterns due to temperature differentials in the atmosphere.