The rocky mountains extend from the mexican border up through canada and alaska. true or false?

That is false, the rocky mountains only go so far south to where it stops around the upper part of new mexico, not mexico itself.

It is useful for historians to write narratives so that history can be passed on from their point of view.  think about a story being told in third person, then think about it again being told in first person, by someone who actually experienced the event.