The earliest examples of visual media date back to ____________________.
around the time of the invention of electricity
hundreds of years ago
around the time of the invention of the printing press
Conjunctive adverbs are used to __________.
coordinate equally important ideas
create parallel structure
eparate coordinate ideas
create balance among grammatical elements
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga.
Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus.
Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
Well for one thing electricity was never 'invented' per say. Nearly 100 years and and the invention of the printing press occurred near the same time if we are talking about Gutenberg. Yet near the 20th century which is 100 years ago we first see real examples of print media which is one form of visual media however, printing and art have been around since the dawn of man. So my best guess is nearly 100 years ago.
For the second question they are most definitely used to create parallel structure. The term parallel structures simply refers to similar grammatical forms. The forms can be words, phrases, clauses, or even sentences. Coordinating conjunctions always link parallel structures. The coordinating conjunctions are (and), or, (but) [which are always coordinating conjunctions], and (so), (for), (yet) [which can be coordinating conjunctions but are also used in other ways].