What are three reasons why such primary sources are important to the study of hist

Historians rely upon these sources to get the perspectives of people who participated in historical events.

Primary sources help historians and students relate to events of the past.

These sources help students develop the skills, knowledge, and  critical thinking needed to interpret them.

Explanation:

in 1803 the louisiana purchase took place, doubling the size of the country. by 1840 almost 7 million americans had migrated westward in hopes of securing land and being prosperous. the belief that settlers were destined to expand to the west is often referred to as manifest destiny.

explanation: