To conclude and restate your point
Public service journalism "refers to times when the media acts as an advocate for the public" and "<span>is also known as investigative reporting and
attempts to uncover information that might be helpful or prevent
exploitation of the public or individuals."</span>
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Answer:
Some cities were linked to each other by straight limestone causeways, known as sacbeob, although whether the exact function of these roads was commercial, political or religious has not been determined.
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