Why was the ice age an important factor in the populating of north america?

In what way did expansion and global trade during the 15th to 18th centuries affect the economies of european countries?

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 a. primary sources are historical documents, and secondary sources are modern-day documents.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.

What were the shared risks of the signers of the declaration of independence were taking impending their names to the document?