The correct answer is - the Caribbean.
The Caribbean region is a region that is composed of numerous islands of different sizes and shapes, and they are all surrounded by water on all sides. All of the islands are heavily dependent on the marine ecosystem in order for them to be able to function properly. If there's a problem with the marine ecosystem, and it gets severely damaged, than the effects on the people on the islands will be devastating, as they will be left without their main food source and they will lose the tourist attractions, so their economies will crack down, and there will be a terrible famine.