Which of the following is an example of a crisis?

A burning building is considered a crisis because it represents an immediate threat to life and safety. In a crisis situation, the urgency and severity of the events require immediate action and decision-making to mitigate harm or damage. A burning building poses significant risks, such as the potential for injury or loss of life, property destruction, and the need for emergency response.

In contrast, the other options involve scenarios that do not inherently demand immediate emergency response or indicate an acute threat. A routine day at work signifies normal operations without significant disruptions, while deciding to change jobs is a personal life choice that may involve planning but does not constitute an emergency. Winning a lottery can be a life-changing event, but it does not carry the same level of urgency or immediate danger associated with a crisis situation like a burning building does.