Where somalia is located in continental area

For one week be an inventor and write down ideas for products or services that you think should be produced

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?

Who developed the theory of plate tectonics?