BRAINLEST TO THE BEST ANSWER
Write your own sentence that imitates the structure of the mentor sentence. It should be related to this unit in some way.

must have a dependent clause that begins with a subordinating conjunction followed by an independent clause.

the unit is about slavery

Well, as much as I would like to be as accurate as possible in my response, I am unfamiliar with the unit you have studied, so I can't write about the unit's content. All I can do is write a generic sentence for you. Perhaps you can tweak it to suit your needs.

How about this:

Until it was destroyed by the Civil War, slavery made the American South the richest and most powerful region in America.

Explanation:

appropriate

adjective: correct or right for a particular situation or occasion

verb 1: to take and use for a purpose

verb 2: appropriate also means to steal

inappropriate

unsuitable, esp. for the particular time, place, or situation: