Why did geographical barriers such as rivers and mountains limit settlement in colonial north america?

Which document does the second paragraph of the declaration of independence echo

How were native american leaders and egypt leaders similar

The 14th amendment overruled the supreme court case of dred scott vs. sandford. the landmark supreme court case determined which of the following points? a.slaves could not be citizens b.non-landowners could not be citizens c.blacks could not be citizens d.all persons born or naturalized in the united states vary differently in citizen status.