Which location is least likely to experience a volcanic eruption?

a. an island hot spot, such as the island of hawaii

b. hamilton county on the plains of central texas

c. a convergent boundary, as in the ring of fire

d. a volcanic island arc, such as the aleutian arc in alaska

This is a 2017 topographic map of puerto rico in the united states, and i'm sorry that people there have suffered such a disaster. i want to ask, what do the yellow dots and areas represent on this graph? and the blue area and the little blue circle, and the little blue sign that looks like a signal tower, what do they stand for?