Before the development of agriculture what was the most likely reason for groups of people to move from one place to another constantly?

How did chris mccandless feel before and after going into the wild? i need with a compare and contrast slide for a project

Which of the following traded items would most likely have led to dependency among civilizations during the vedic age?

Which items are described by the geographic theme of movement? ahmad's great-grandparents were originally from afghanistan. songs and movies made in india are very popular in afghanistan. afghanistan is east of iran. afghanistan's rugged mountains provide protection for its people. much of afghanistan's forests are being cut down for fuel. afghanistan exports wool to turkey and india.