They are probably the most important document in understanding history. Without writing we would have a difficult time understanding archeological data. Also journals give great detail about wars and other major conflicts that would otherwise be unknown to historians.
Formal/persuasive. Hope this helps :)
Answer:
C
Explanation:
dangerous to social harmony and community stability
Answer:
Good
Explanation:
I would add a bit more punctuation, like commas, and search thesaurus, and find some more descriptive adjectives.