Question

what the main sources​

Answer 1

Answer:

Explanation:

For what you are asking, about main source

Answer 2

Answer:

Primary sources are firsthand documents that provide direct evidence on your topic. The Library of Congress refers to them as the "raw materials of history — original documents and objects which were created at the time under study.

Types of Sources

Types of Sources stationary sources – such as power plants, oil refineries, industrial facilities, and factories. area sources – such as agricultural areas, cities, and wood burning fireplaces. natural sources – such as wind-blown dust, wildfires, and volcanoes