Answer:
If its just a pick one, then the top
Explanation:
The first one to me seems to be the best one to say it would be a concern for an education for K-12 levels.
The main way in which the creation of new states changed the political boundaries of the great plains was that each state had to have borders, that were usually based around rivers.
A four sided tapered monument with a paramedial tip.
That is an example of obelisk, since this conforms to the definition of the shape itself.
