The correct answer is true.
It is true that experts predict that a future disease outbreak will spread rapidly because much of the world's population lives in crowed urban areas.
Scientists consider a great risk the possibility of a disease outbreak in some regions of the world because population lives in crowded urban areas, and this means a high risk to be contagious by sick people. That is why governments need to be prepared to act swiftly in the case on an emergency like this.