The best example of heat transfer by convection is when

A. sunlight warms soil

B. a ceiling fan blows air

C. heat rises from a chimney

A). Heat travels from the sun to the soil by radiation.

B). A ceiling fan moving air around doesn't say anything about heat.

C). It's not heat rising from a chimney. It's heated air.

Whenever you see a heated substance rising through some of

the same substance that's cooler, you're seeing convection.