How did slaves to grow the colonial economies? by developing new land by producing art and music by producing raw materials by producing manufactured goods

Which factor has played the most important role in changing the way history is studied over time?

Space is not completely empty. there are small particles in space. what happens when these particles come together?

How did the construction of the erie canal improve transportation in the united states in the 1820s? a. the canal connected the great lakes to the mississippi river. b. the canal connected the great lakes to the ohio river. c. the canal connected the atlantic and pacific oceans. d. the canal connected the great lakes to the atlantic ocean.