the air in a sealed jar the wire in a metal hanger the water in a small puddle the sound in a loud classroom
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which of the following is an example of a form of energy?
Possibilities:
- the air in a sealed jar
- the wire in a metal hanger
- the water in a small puddle
- the sound in a loud classroom

the sound in a loud classroom