What are some examples given of liberal media sources? And
conservative media sources?

Examples of liberal media sources are The New York Times and National Public Radio (NPR).  Conservative media sources are Fox News and The Washington Times.

Explanation:

Whether news and public opinion media are liberal or conservative often affects how they present information and the kind of news and information they report. Some sources have a liberal slant like The New York Times (NYT) that often published stories and features that critique the status quo and they do investigative journalism into corruption scandals and high-powered institutions to try to educate the public on these issues. Conservative interests say that the liberal news is biased against them or fails to report on the positive things that conservative-leaning officials and figures do.  The conservatives accuse many liberal sources like NYT and NPR of being elitist and overly academic.

industry had made the u.s. the richest nation in the world at this time. the second industrial revolution caused growth in industry and transportation, which allowed increased trade between nations.

probably 3 since archeologists and historians don’t understand there writing.