A more thorough explanation:

A curfew is a law or regulation that sets a specific time when people are not allowed to be outside or in vehicles. This is usually done for safety reasons or to prevent crime.

1. A city has a curfew that requires all minors to be off the streets by 10 pm. This means that anyone under the age of 18 cannot be outside or in a car after 10 pm.

2. During a state of emergency, a curfew may be put in place to keep people safe. For example, if there is a hurricane, people may be required to stay inside their homes during certain hours to avoid danger.

3. In the past, curfews were used to prevent fires. A bell would ring at a certain time, and everyone had to put out their fires and go inside for the night.

These examples illustrate how a curfew can be used to keep people safe and prevent crime. By setting specific times when people cannot be outside, it can help reduce the risk of accidents or criminal activity.