Sunlight travels from the Sun to warm Earth. Boiling water in a pot warms a spoon inside the pot. A fire in a fireplace warms the air in a room. Cold water is heated in a microwave oven.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which event is an example of conduction?
Possibilities:
- Sunlight travels from the Sun to warm Earth.
- Boiling water in a pot warms a spoon inside the pot.
- A fire in a fireplace warms the air in a room.
- Cold water is heated in a microwave oven.

Boiling water in a pot warms a spoon inside the pot.