Explanation:

- Void agreements are essentially null and unenforceable from the start, meaning they have no legal effect.

- Because they are unenforceable, engaging in a void agreement is generally:

- Option 1: Not punishable

- Since there's no legal obligation or recognition from the start, there's no basis for punishment.

- Option 2: Punishable

- This would imply a legal consequence, which is not the case for void agreements.

- Option 3: Prohibited

- While void agreements are not enforceable, they are not explicitly prohibited unless stated by law.

- Option 4: Illegal

- They lack validity but are not necessarily illegal unless they breach specific laws.