13. An intervening obstacle is a man-made feature that haits or slows migration from one place to another
А. True
B. False

By the triangle inequality theorem, if two sides of a triangle have lengths of 3 and 7, what are all the possible lengths of the third side? a) 3 < x < 8 b) 3 < x < 7 c) 4 < x < 10 d) 5 < x < 7

The point where two air masses meet is called a

How did the korean war impact the elections of 1952?