First, you need to determine the purpose behind writing something - is it to educate, to entertain, to scare? After that, you think about the genre - what you are actually going to write about - is it going to be a horror story, a romance, a comedy, etc. After that, you organize everything, think about what should go where, what comes first, etc. And in the end, you connect everything by adding details of your choice that are suitable for your story.
"A. a giant snowman" would constitute the adverb phrase in this sentence. In general this phrase comes after the subject noun, but not in all cases.
Answer:
c. Contrast
Explanation:
The sentence above presents a transition term that can be classified as a contrast transition. This term is the words "Even though" which gives off a meaning of contrasting concepts, that is, this term shows a contrast in relation to Americans' concern about AIDS in the USA and the prevalence of this disease worldwide.
The term shows that AIDS is a worldwide disease in contrast to the concern of Americans.