As two preschoolers play "school," one pretends to be the teacher and the other pretends to be the student. the children are engaged in

idk but found this on google

"the kansas-nebraska act allowed each territory to decide the issue of slavery on the basis of popular sovereignty. kansas with slavery would violate the missouri compromise, which had kept the union from falling apart for the last thirty-four years. the missouri compromise had prevented this from happening since 1820."

this question does't support enough resioning to answer.