Explanation:

- Theft: The act of taking someone else's property without their permission and without intending to return it. It does not involve violence or threat.

- Robbery: Theft accompanied by violence or threat of violence. In this case, causing hurt to escape after stealing qualifies the act as robbery.

- Extortion: Involves obtaining something through force or threats. It typically does not involve an immediate act like stealing.

- Dacoity: Involves five or more individuals committing robbery together.