Answer:
Tsunami are waves caused by sudden movement of the ocean surface due to earthquakes, landslides on the sea floor, land slumping into the ocean, large volcanic eruptions or meteorite impact in the ocean.
Explanation:
I don't know if this answers your question, if not, sorry.
Coastines on opposite continents appear to fit like puzzle pieces, indicating that they were once joined.
Answer:B:the border between the soviet satellite states and western Europe
Explanation: GradPoint