Lightheartedness means cheerful, carefree ect.
This means the line "The sounds of water splashing and laughter echoed in the distance; Tim's friend's had gone for a late-night swim." is the phrase that is the correct answer, since it talks about the happy actions of Tim's friends.
Answer C.
Ok is there any additional information?
I think that what you are asking is which word is a subject complement in that sentence. What I think the answer to this question is the word third.
Answer:
B. In the absence of surprise, a witty remark loses much of its humorous effect.
Explanation:
Answer B
Correct. In the first sentence of the third paragraph, the author makes the claim that “merriment” (amusement) can be produced only by “a sudden impression,” that is, a surprise. In the second sentence of the paragraph, the author advances that claim by using the clause “which is expected” to assert that jests (witty remarks) lacking such an element of surprise (because the audience is expecting them) lose much of their humor and are thus effectively “already destroyed.”
God over the underworld. he rules the underworld