Most earthquakes happen:
A. in a ring around the Atlantic Ocean.
O
O
B. near active margins.
O
O
C. near regions with no subduction.
O
O
D. in the middle of continents.

Which of the following events did not occur as a result of china’s open-door policy? a. trade between japan and china was encouraged. b. all countries were given equal access to chinese ports. c. foreign influence in china increased. d. the influence of the communist party weakened.

The vegetation that thrives in the tundra is limited to a. mosses, barley, wheat, and corn. b. coniferous trees. c. dwarf shrubs, mosses, lichen, potatoes, and beans. d. mosses, lichen, algae, and dwarf shrubs.

Which barrier to economic development is shown in the following examples?