Out of the provided options, the following details should be included in a summary of “The Chenoo”:

• The brothers find evidence of the Chenoo, a frightening monster. This detail sets the stage for the story and introduces the main conflict.
• Because of the siblings’ kind treatment, the Chenoo transforms into their grandfather. This is the central resolution of the story and reveals the theme of kindness and its transformative power.

While the other details you mentioned might be interesting snippets from the story, they are not crucial for understanding the main plot and message.

Here’s why the other options shouldn’t be included:

• The Chenoo’s footprints are over two feet wide. This detail describes the physical characteristics of the Chenoo but doesn’t contribute significantly to the overall story arc.
• To save herself, Nolka pretends that the Chenoo is her grandfather. This is a minor detail within the larger arc of the siblings’ kindness transforming the Chenoo.
• The siblings try to keep the Chenoo occupied in the sweat lodge so they can escape. This plan ultimately fails, and focusing on it might give a misleading impression of the story’s resolution.
• The Chenoo’s voice gets quieter as he sings. This detail is descriptive but doesn’t hold major significance in the plot or theme.

Remember, a good summary