It's The Heart. Hope This Helps
While none of the answers is what I consider the main idea of this essay, I believe that C is the best possible answer. Each of the paragraphs discusses how particular groups are impacted by the use of lights in urban areas.
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alisa202
B. Keep cords and hoses away from heat, oil, and sharp objects.
You never carry an object by the cord no matter what the conditions are so that's why A and C are wrong