- Water is a kind of substance
- Boiling means matter / a substance changes from a liquid into a gas by increasing heat energy
- Hence, water boiling is when water changes from a liquid into a gas by increasing heat energy

Therefore, water boiling is when water changes from a liquid into a gas by increasing heat energy
Q: The boiling of water results in a physical change in matter from
Context:
- Water is a kind of substance 
- Boiling means matter / a substance changes from a liquid into a gas by increasing heat energy