Which comparison best distinguishes Mary Rowlandson from Las Casas?

Banneker’s letter to Thomas Jefferson is especially significant because Banneker:  

Brown’s speech can best be understood as challenging the legal system’s distinction between:

Thoreau’s use of nature in Walden is significant because nature functions as:

Lincoln’s closing appeal to “the better angels of our nature” is best understood as:

Why is Douglass’s acquisition of literacy particularly important to his narrative?  

Which of the following was a major consequence of the Columbian Exchange?

Which Native American group is known for their extensive trade networks and large earthwork mounds?

Which strategy does Tecumseh use most effectively?

Which interpretation best explains why Brown became such a divisive figure before the Civil War?