The sun dance was a ceremony in which cheyenne men
a.
sang songs to the sun to provide warmth and sunlight for their crops
b.
danced to beating drums without food until they saw visions
c.
lit a large fire and danced to bring in the new year
d.
prayed to the sun for harmony and peace throughout the region during times of war

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?