<span>The name given to the loose organization of people dedicated to helping escaped slaves get to free territory was the Underground Railroad. During the mid 19th century, this network of secret routes and safe houses was created so as to help slaves who have escaped from their owners get to the North where slavery was abolished. Because at the time, it was still legal in the South of America.</span>
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1.Medicine
2. Astronomy
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Answer: Easy
Explanation: We get a day off so who cares if he discoverd the cuban islands
The correct answer should be Elevated trains and subways replaced horse-drawn trolleys
Then, with the invention of the steam engine, electric motors and engines powered by the burning of fuels, ground transportation began to be performed by trains, cars, buses and trucks, among other vehicles.
Every day the means of transport are modernized more, gaining greater speed, efficiency and comfort.