Research in which existing data, such as census documents, college records, and newspaper clippings, are examined to test a hypothesis is known as

I believe the answer is: Archival research

In the past the data for Archival research could be easily accessed by public through things such such as documents on repository or books/articles kept in library. Now days, archival research could be done by everyone through the internet from the comfort of their own home.

well, there are a lot of places we get information about earth from. like science classes, websites, books, newspapers, etc.

yes

it is because 3 because the citizen the northern democratic party watned the warning on red to blue because it is purple. lol