I believe the answer would be "slogans".
Let's begin with looking at the question. We know that this will be an <em>audio </em>message broadcasted to a <em>large </em>audience, so we need to keep these facts in mind when we look at the answer choices. Answer choice A, slogans, appears correct, because slogans are easy to remember especially for a large audience and can be broadcasted as an audio message. Next, answer choice B, appears incorrect, as images cannot be broadcasted via audio. Answer choice C, text, also cannot be broadcasted via audio. Last, although answer choice D is audio-based, it does not enhance the <em>message </em>of the PSA. Therefore, I believe the answer is A, Slogans.
Answer:
1. who
2. who
3. That
4. who
5. That
6. who
7. that
8. who
9. who
10. that
11. which
12. who
13. that
1. The man wearing sunglasses THAT works in a restaurant.
2. My mother made a delicious ice cream, WHICH I ate all by myself.
3. Paul is reading a book THAT is very interesting.
4. Pizza is a popular food THAT was first made in Italy.
5. Albert Einstein was a scientist WHO did many important things.
6. This is the book WHICH wasn't available in the library.
7. This is the CD THAT I've played hundreds of times.
8. I've never net the man WHO helped me this morning.
9. I hate the music THAT is too loud.
10. Can you pass me the pen? THAT is next to the dictionary.
Explanation:
"who" when referring to people.
"That" when referring to objects, non humans.
Answer:
to effectively convey his topic/purpose
Explanation:
in couching his appeal to the audience as an appeal to duty,
The sentence that uses parallel structures is B) My three favorite activities are writing, reading, and going to the library.
A parallel structure means that the same form of a verb is used in a sentence, and as you can see, here only gerunds are used - writing, reading, going - they all have -ing in the end.
The other sentences don't have a parallel structure because they don't use the same forms.