What is meant by "preference levels" for immigration to the U.S.?

Question

i need to know this for AP Human Geo.

Answer 1

Generally, "preference level" is used when discussing family based immigration. Since this is something you need for a class, I'll let you learn it instead of telling you. The link below describes the different preferences.

http://www.travel.state.gov/visa/frvi/bulletin/bulletin_3169.html