Tone in fiction is the attitude of the narrator or viewpoint character toward story events and other characters. In a story with first-person POV, tone can also be the narrator’s attitude toward the reader.
In non-fiction, tone is the writer’s attitude toward subject matter and reader. So the writer might come across as a know-it-all or a blowhard or as humble or solicitous.
1. Where can I find the book about gardening
The answer is B) It suggest a tone of worry. The reason is because the phrase "knitting their cheeks" means the that the llamas were moving their jaws. This along with the fact that they were contemplating the writer suggests that the llamas are unsure of the writer.
Tragedy is everywhere, I believe is your answer.
A rough draft to see where you story will go