Please help me please it is so important please

Identify the type of source based on the information provided. a historian found a journal belonging to an ancient indian princess. the princess liked to keep a record of all the royal women of her dynasty who lived before her time. she tried to collect as much accurate information about their history as possible. her journal is a great source of historical information. based on the passage, the princess’s diary is source.

56: 58 the assembly line was a system through which items were mass-produced in a flow.

Why is it important that dr. luther king jr. use non-violent protest to create social change?