Which number on the map represents the ganges river?

How has the geography of india made it difficult for its people to expand before modern technology?

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?

What is the correct order (starting from the surface) of warts layers