My best guess for this question is to find good topic to talk about, and if your topic is too broad it may be hard to find information. So if your topic is too broad you have to do a lot of research, and find information that you thought made sense.
Answer:
you can write how whites were doing for blacks, how they treats them, the difference of past years and now
Answer:
By mentioning visitors and railroad advertisements, Cobb highlights that the trees have brought a large number of tourists to the city.
Explanation: