A key difference between natural and human-made disasters is that human-made disasters often involve:

• A. They occur only in cities.
• B. They often involve deliberate or negligent human actions.
• C. They are always more deadly.
• D. They do not require emergency response.

Answer: (B)

The main idea is that human-made disasters arise from human actions or decisions, not from natural processes. This question highlights that they often involve deliberate or negligent actions by people—things like terrorism, industrial accidents caused by safety lapses, or infrastructure failures due to bad planning. That human factor is what distinguishes them from natural disasters, where the harm comes from natural events such as earthquakes or floods rather than intentional or careless human behavior. The other statements don’t fit as consistently: disasters can occur in many settings, not just cities; the deadliness varies and natural disasters can be just as deadly or more so; and emergency response is typically needed in both types, not something that can be ruled out for human-made events.