Answer:
Coastal regions are particularly vulnerable to the impact of a tropical cyclone
Explanation:
The two main factors that affect density of ocean water are the temperature of the water and the salinity of the water.
B. 1 in 4 which is also 25%
A divergent boundary is where two plates are moving away from each other. They are mostly found at oceanic spreading centers. The most well known one would be the Mid-Atlantic Ridge located in the center of the Atlantic Ocean. I think you mean a divergent boundary.