Which of the following explains best why guangzhou ranks so high on the world bank list of coastal cities vulnerable to flooding?
1.guangzhou is a on major river estuary with through which storm surge can flood low lying, densely populated city.
2. all of guangzhou is at or below sea level and has no flood protection and nowhere to evacuate.
3. guangzhou is a small, poor city in china located directly on the shore of the south china sea.
4. guangzhou is a wealthy mega city and has state of the art flood protection on all sides.