Based on the information in the excerpt, many in Canada believe that immigrants contribute to ?

How does the bare soil surface type affect the amount of runoff

Which of teh following would explain the importance of the trans-siberian railroad to russia's economy? (schoology test)

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?