a space heater turned on water boiling on the stove sunlight shining through the window a metal spoon warming in a pot of hot soup
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which is an example of conduction?
Possibilities:
- a space heater turned on
- water boiling on the stove
- sunlight shining through the window
- a metal spoon warming in a pot of hot soup

a metal spoon warming in a pot of hot soup