Technological advancements have played a significant role in human migration patterns throughout history. Using what you learned in this lesson, explain how advancements in boat technology affected the migration of humans. Examples of boats include canoes, sailing ships, steamboats, and ships powered by combustion engines that run on diesel and gasoline.

What is the main difference between primary and secondary sources? a. primary sources are historical documents, and secondary sources are modern-day documents. b. primary sources are derived from museums and archives, and secondary sources are created by history students and academics. c. primary sources are found in ancient places with a rich history, and secondary sources are found in historical journals and blogs. d. primary sources are created during a particular historical era, and secondary sources are created by studying primary sources.