To start, try finding out what year the novel "To Kill a Mockingbird" was written. This is something you can find easily by conducting a Google search. Searching something like, "To Kill a Mockingbird publish date" or "When was To Kill a Mockingbird written?" should get you your answer.
Once you have the year, then your task will be to find out about the social and political climate of that year or around that time period.
By social and political "climate" this question is asking what the "climate" or environment/atmosphere/setting was like as far as the society and political scene during the year the novel was written. In other words, what sorts of things were impacting society (how people interacted with one another within and between identity groups), and what sorts of things impacted the political decisions of the day (during the time the novel was written).
(By "identity group" I mean groups that people are a part of that provide identity to them, such as "American" "Christian" "Hispanic" etc.)
In summary, if you can answer the following questions, you should have your answer:
(1) In what year was "To Kill a Mockingbird" written?
(2) What factors impacted how people interacted with one another within and between identity groups during that year/during that time?
(3) What factors impacted the political decisions during that year/during that time?
Your teacher probably gave you some suggested resources, but if all else fails, Google will be a good starting point.
Hope this helps,