"Water quality" may include the amounts of dissolved oxygen
and the levels of algal growth, pollutants which may be present and the pH level. Water quality effects also which types of organisms can
survive in a body of water.
Shellfish require a high level
of dissolved oxygen and their abundance is an indication of good water quality. Shellfish are sensitive to changes in the ecosystem and they cannot easily escape changes in the water quality. These are one of the reasons why shellfish are good indicators of water quality.
Hawaiian islands were formed by earthquakes, Million years ago there used to be a super continent that was called Pangea a super continent is a bunch of countries smushed up together anyways there were all lot of earthquakes as time passed and continents were spreading apart and that's how the Hawaiian island were formed
Considering the world population trend over time..
It is option C. population growth.
