Question

which type of geographic tool would best help show where immigrants to the us moved over time?
o a us map showing population distribution
o a timeline of changes in immigration policies
o a bar graph showing total immigration numbers
o a world map showing immigration routes

Explanation:

A world map showing immigration routes would display the paths immigrants took to the US over time, fulfilling the requirement. A US map of population distribution doesn't show movement routes, a timeline of immigration policies doesn't show physical movement, and a bar - graph of total immigration numbers doesn't show where immigrants moved.

Answer:

a world map showing immigration routes