Why were diseases the greatest threat to the existence of american indians?

When a nation depletes its natural resources, it often experiences rapid decline because it:

What amendment limits the government's power to take away individual liberties -first -second -ninth -all of the above

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 a. primary sources are historical documents, and secondary sources are modern-day documents.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