3 factors to consider when conceptualizing a map for early grade school child

Eastern europe’s population growth can be attributed to these factors. select all that apply migration

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?

This desert is found in the northern part of africa and covers 3.5 million square miles.