The question ask to choose among the following choices that is not a difference between schools in Puerto Rico and schools in Los Estados Unidos. Base on the question, the possible answer would be the last choice that states "Students study both spanish and english". I hope this would help
An important difference between Edison‘s inventions and those dire industrial technologies after the civil war was Edison's early inventions did not favour mass production of goods.
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The emergence of urgency for new industrial technologies resulted in the invention of many crucial machines and devices. These technologically advanced machines proved beneficial in undertaking mass production of commodities.
The early inventions of Thomas Alva Edison were not relevant to the contemporary need of the industry as the inventions were that of the phonograph and the incandescent bulb.
Before, trains, cars, airplanes and trucks existed, rivers were used for travel. They carried people and goods. However, this way of transportation was very slow. All that changed with the arrival of the steamboat in the late 1700s and early 1800s. The steamboat could travel at the amazing speed of 5 miles per hour. It soon changed all over river travel and trade and dominated the waterways.
