Compound sentence (even though technically he also made the sentence longer)
Answer:
“regarded himself as especial mastiff-in-waiting to protect the two young artists in the studio above.” ( Paragraph 30)
Explanation: My friend completed it and showed me the answers
by explaining that the travel time in the air was about the same as by train.
You don't have answers to choose from.
The answer would be the second one because it is showing an image or reflecting back the artist’s perspective either would work but the answer is 2