What does Professor Worster identify as the primary cause of the Dust Bowl?

Ineed with what i should write for my research paper. my topic is history of slavery. 1800 words. all i need is what to write in each paragraphs. like when the research paper has titles for each paragraph and it explains the tile in each paragraph. for example when did slaverh begin? why did it begin like an outline.

At which battle did the duke of wellington defeat napoleon?

What does british gen. cornwallis tell tavington how he has been conducting himself?