Question

70 What are the sowices of history?​

Answer 1

Answer:

1970 – The first Earth Day is observed. 1970 – Kent State and Jackson State shootings occur during student protests which grow violent. ... 1970 – The Occupational Safety and Health Act, or OSHA, is signed into law. 1971 – Singer Jim Morrison dies of a drug overdose at the age of 27.

Explanation:

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Answer 2

Answer:

Historical source (also known as historical material or historical data) is original source that contain important historical information. These sources are something that inform us about history at the most basic level, and these sources used as clues in order to study history

Historical sources include documents, artifacts, archaeological sites, features. oral transmissions, stone inscriptions, paintings, recorded sounds, images (photographs, motion pictures), and oral history. Even ancient relics and ruins, broadly speaking, are historical sources.