Push and pull factors that lead citizens from Vietnam to immigrate to Minnesota

Plants can have a positive and negative effect on the rate of weathering

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?

Need this asap : ( which type of wetland is most likely found in warm, forested areas? bogs swamps salt marshes inland marshes