Well, the excerpt itself states the possible topic numerous times throughout the passage - it should be loneliness.
The author states how lonely this young girl is, so lonely that she cannot even speak because of the fact that she is missing someone next to her. She doesn't want to be alone anymore because it is breaking her heart, and this is the feeling that the excerpt conveys.
Answer: Apostrophe
Explanation: The apostrophe character in the English language is used for marking the skip or one or more letters and when we are marking possessive nouns. This is a punctuation mark and it is shown as - '
Examples of an apostrophe when it's applied to contractions: are and not are making aren't or for example they and have will make they've with an apostrophe
