Which of the following best describes mystery?

a story that includes characters who figure out a puzzling situation
a story that includes characters who figure out a puzzling situation

a realistic story that takes place in a different time period
a realistic story that takes place in a different time period

a story that takes place in the real world, usually in present times
a story that takes place in the real world, usually in present times

a story that includes characters who have an experience that involves excitement and usually danger
a story that includes characters who have an experience that involves excitement and usually danger

The first and last options both best describe a mystery. A mystery is a story that includes characters who figure out a puzzling situation and often involves excitement and danger.