Harm can come from things that you can't control, such as a tornado. But it can also come from things you can definitely control.
Every choice carries some risk.
The risk can be large or small and immediate or long-term. Finding answers isn't always easy. Even when you do have the answers, avoiding risk isn't always possible. For example, you can choose whether or not to get in a car with a drunk friend at the wheel. However, you may have to ride a school bus, get a ride from family or a friend, or walk across streets to get to school each day.