Answer: A. Definitions
Dictionaries are one of the general references found in libraries wherein you don't have to read it from cover to cover. All you have to do is to scan on specific words you are looking for. All the dictionaries provide definitions however,not all of them gives the language origin, history of the word and even synonyms.
Answer:
By sharing a hypothetical story as an example of the subject.
Explanation:
In these lines, we see that the author is sharing a hypothetical scenario where a girl named Alice is having a party. This girl delivers her invitations in two different ways: ordinarily and digitally. The outcome in both cases is quite different. The author uses this examples in order to show how the two types of mail can differ significantly.
Social Studies if your comparing wars and deaths.
Answer:
I think all of the above because without all of them your essay wouldn't make sense
