Fact 1: Aship is used for moving people across bodies of water.

Fact 2: Hurricanes and treacherous shipping lanes frequently scattered treasures and crews across the reef.

Given the two facts above, answer the question "moving people across bodies of waters requires avoiding what" with the following options: 
- energy barrier
 - erosion
 - storms
 - energy usage
 - salinity
 - hurricanes
 - friction
 - massive damage


 

      hurricanes   