The map below shows the location of some natural resources in North America. According to the map, which natural resource can only be found in Canada?

Oil

Silver

Coal

Uranium

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The service industry in the united states grew in the late 1800s. what was one effect of that growth? the number of people with jobs in factories as unskilled workers decreased. the number of people with jobs in factories as unskilled workers increased. the middle class grew as people took jobs as clerks, lawyers, and teachers. the middle class shrank as people left jobs as clerks, lawyers, and teachers.