Why did americans want to cut back immigration

Which of the following inventions most directly allowed ancient farmers to produce a surplus ?

Which factor best suggests a cause for the urban problems shown in this table? (3 points) increasing discriminatory housing practices shifting population density gradients over time declining urban renewal efforts by city governments declining basic employment sector in industrial cities increasing gentrification efforts in the inner cities

Why is it important that dr. luther king jr. use non-violent protest to create social change?