<span>Chicago
Chicago was the focal point of the dairy and meat market of the United States. It was a railroad center serving all areas of the nation and was near the Great Plains. Its South Side rail yards were the site of the celebrated Chicago Stockyards, where dairy cattle were penned before shipment somewhere else. A portion of the breeds still meandered the fields openly, originally of European stock brought over by the Spanish in the 1500s.</span>
Answer:
Among the options given on the question the correct answer is option A,
It helped trains run on schedule and avoid collisions.
Explanation: The multiplex telegraph is a device which helped the train in 18th century to run without collision and on schedule.The multiplex telegraph was invented by the Granville T. Woods in 1887.
During that time the train collision was a big problem which caused lot of damage of both life and resources. The reason of the problem was the dispatchers of the train could not communicate with each other easily while controlling the rail way traffic. So the accidents were very common.
But the invention of multiplex telegraph helped the dispatchers to communicate with other dispatchers in different stations.
So, this invention made the rail road safer in 1800s by helping train to run on schedule and avoid collisions.
This is a question you answer with your opinion , so its either yes or no.
Traditional subsistence agriculture has turned into industrial mono culture farming. Among the negative effects are deforestation, soil degradation due to the use of toxic pesticides and the lack of variety in crops, decreased food security due to the use of agricultural lands for commercial crops with no alimentary value such as rubber and abusive private appropriation of land by industrial agricultural corporations. Among the positive effects in Thailand and China, because of their logistical, financial and educational support of poor farmers, the latter have been able to take advantage of the rubber boom and prosper, leaving poverty behind.
