An example of convection would be:

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Convection is the process of heat transfer through the movement of fluids (which includes liquids and gases) caused by differences in temperature and density within the fluid. When warm air or liquid becomes less dense, it rises, while cooler, denser fluid sinks, creating a circulation pattern that facilitates heat transfer.

In the context of the given options, warm air rising from a radiator is a prime example of convection. As the radiator heats the air around it, that air expands, decreases in density, and rises toward the ceiling. Cooler air then moves in to take its place, gets heated, and rises again, establishing a continuous cycle of movement and heat distribution throughout the room.

Other options illustrate heat transfer processes that do not primarily involve convection. Heating water in a pot over a flame does involve convection in the water, but the broader context is about the method of heating itself, which includes conduction from the pot to the water and radiation from the flame. Touching a hot stove exemplifies conduction, where heat is transferred through direct contact. Feeling warmth from a campfire involves radiation, where heat is emitted in the form of infrared radiation and travels through the air without the need for direct contact. Each of these processes illustrates different mechanisms of heat transfer, but the

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