Which of the following is an example of cultural diffusion?

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.

Because its government strictly controls its economy, north korea has a economy. a. command b. mixed c. traditional d. free market

In the diagram, δgef and δhef are congruent. what is the value of x?