Answer:
Based from the definition of terms presented, the following is the answer to the questions.
1. B. The study of statistics such as birth rate and death rate.
2. B. A group of symptoms that occur together.
Answer:
If you were writing it as a proper noun, yes.
Explanation:
If you wrote 'I admired the Appalachian Mountains on Tuesday,' then yes. If you wrote 'I like to look at Mountains,' then no.