Final answer:
Brock feels intrigued about the 'ancient fictions' in 'The Last Dog'.
Step-by-step explanation:
The word that best describes how Brock feels about the "ancient fictions" in "The Last Dog" is intrigued. In the story, Brock interacts with ancient fictions, which are fictional characters from ancient times. He is fascinated and curious about these characters, finding them interesting and engaging. This is evident when he actively seeks out and engages with the ancient fictions, showing his genuine intrigue and interest in them.
Learn more about Brock's feelings towards ancient fictions in 'The Last Dog'