Explain why you must/mustn't do each of the actions listed.

Here are the explanations: - **Wear a seat belt**: You must wear a seat belt because it ensures your safety in case of sudden stops or accidents, preventing injuries. - **Look both ways when you cross the road**: You must do this to check for oncoming vehicles, ensuring it's safe to cross and avoiding accidents. - **Walk on the pavement**: You must walk on the pavement to stay separated from road traffic, keeping pedestrians safe. - **Talk to the driver**: You mustn't talk to the driver as it can distract them, increasing the risk of an accident. - **Run onto the road**: You mustn't do this because it is dangerous and doesn't give drivers enough time to react. - **Lean out of the window**: You mustn't lean out of the window as it is unsafe and could lead to injury.