Answer: Because sand dunes protect inland areas from swells, tides, and winds, they must be protected and defended like national treasures. A strong and healthy beach dune is a powerful antidote against coastal erosion. The ocean and the wind can have an unpredictable, destructive force on coastal regions.
B. Napoleon invaded Spain and Portugal - situation in Europe particularly in Spain provided an opportunity for Spain's overseas territories to fight for their independence. Napoleon's army occupied Spain and Portugal where he wanted to change a king which resulted into civil war.
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