For the first question, the theme found in the Wolf’s words is:
c.) It is easy to be brave when you are in no danger.
This highlights how the Kid feels bold and fearless while being safely perched on the house away from the Wolf, indicating that his courage comes from his secure position.
For the second question, the reason the Kid yells at the Wolf is:
B. He assumes the Wolf is up to no good.
The Kid is expressing anger and bravado towards the Wolf based on his perception of the Wolf's character rather than having witnessed any specific wrongdoing.