sunlight warms soil. a ceiling fan blows air. flames heat up a pan. heat rises in a chimney.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: The best example of heat transfer by convection is when
Possibilities:
- sunlight warms soil.
- a ceiling fan blows air.
- flames heat up a pan.
- heat rises in a chimney.

heat rises in a chimney.