Steam does work on objects. Steam is a form of water. Steam can transfer heat to cooler objects. Steam is able to move through small spaces.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Why can steam be used to cook food?
Possibilities:
- Steam does work on objects.
- Steam is a form of water.
- Steam can transfer heat to cooler objects.
- Steam is able to move through small spaces.

Steam can transfer heat to cooler objects.