They allow you to see how the continents were once placed together.
that would be a primary source because it actually is his hat not a replica. a primary source is a firsthand, or the excerpt of someone who was actually there.
Tsunami I think, hope this helps
The answers are B and also C.
Answer:
Explanation: A dune is a mound of sand formed by the wind, usually along the beach or in a desert. Dunes form when wind blows sand into a sheltered area behind an obstacle. Dunes grow as grains of sand accumulate. Every dune has a windward side and a slipface.
