Can someone pls help me pls answer my most recent question

What deadly disease cost many workers their lives before dr. william gorgas found a treatment?

In what ways did the french revolution produce freedom? what were the limits of this freedom?

Me! these questions are based on american people in the south essential questions: question 1: for what reasons will one group of people exploit another?focus questions: question 1: what influenced the development of the south more: geography, economy, or slavery?question 2: what were the economic, political and social arguments for and againsts slavery in the first half of the 19th century.