The option that is an example of heat transfer by conduction is when air gets warm from a radiator.
The correct option as an example of heat transfer by conduction is "pavement heating up in the sun." Conduction is the transfer of heat through direct contact between two objects or substances. In this case, the pavement is coming in direct contact with the heat from the sun, causing it to heat up. To determine the answer, we need to understand the concept of heat transfer methods, specifically conduction, and identify the scenario where heat is being transferred through direct contact.
