The correct answer are the Barrier Islands.
Steamboats. Steamboats positively effected the world because they made the transportation of goods more efficient and economical. Travel time was cut in half and were a compliment of the railroads, both for commercial and passenger transportation. Steamboats were independent on the wind speed and direction.
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Ahí falta un pvp o manco
Sorry, but there is no picture
C. to convey a certain tone.