Which event causes tides?

the blowing of the wind
the movement of warm and cool water
the interaction of the moon, the sun, and earth
the mixing of surface water and deep ocean water

Long ago, people who lived in coastal north africa most often interacted with

Which continents lie only in the northern hemisphere

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.