Answer:
Im not gonna tell you exactly what i wrote just for plagiarism reasons, but im gonna tell you literally how to write it without actually writing it lol.
1st sentence: Explain the thing you think is a central theme. (theme ideas: racism, family, injustice)
2nd sentence: Explain why you think its a central theme. (say something like "I think its the central theme because it shows up in the book quite a lot.")
3rd sentence: Look back on/explain an occurrence/occurrences that happen in the book that the theme is what you think it is.
4th sentence: explain more occurrences and more evidence as to why you think this is the theme.
5th sentence: think of/find a counterargument and dispute it using evidence from the text. (if you are doing it for family then you could say a counterargument is that family isnt a central theme because it doesnt show up as many times as racism does in the book, and you could dispute that using a few more quotes from the book)
Step-by-step explanation:
I hope this helps you, if you need extra help i recommend going on to a site called litcharts, they have a bunch of quotes from the book that go along with the themes. Heres a link to the site and the themes they talk about: litcharts.com/lit/roll-of-thunder-hear-my-cry/themes