Answer:
Option: b. Feed basaltic volcanoes (composition similar to the seafloor), unless the hot spot is altered in composition coming through a continent, in which case the volcano may be more andesitic.
Explanation:
Most volcanoes found in the plates boundaries but some situated in the centre of the plates. These volcanoes formed over a hot spot where mantle plume is rising in the form of magma. Hot spots are found in the ocean, and on continents.
Hot spot volcanoes occur far from plate boundaries because mantle plumes exist below the tectonic plates. Volcanoes in the Hawaiian Islands and Yellowstone National Park are some of the examples of the Hot spots.
The waterways that border central america are Pacific Ocean and Caribbean Sea ! :)
I assume that the question refers to the political affiliation of the Islands (They are Islands in the Mariana Trench, in the Pacific Ocean, south of Japan) - they are politically linked to the US - the correct answer is a). For example the Mariana islands have a commonwealth status within the US.
An increase in human population leads to environmental issues such as pollution. This is because when there is an increase in population there would be an increase food resources therefore would have more pollution as well as higher gas emissions.