Either add the passage with the question so we know what you are referring to or do not post questions like these. Not everybody has read what you have. This question is completely useless and unanswerable without the story to go off of.
Answer:
What's the excerpt. Also, if it helps, to find the mood of an excerpt you need to consider the tone. To find the tone look at some of the words.
Explanation:
For example:
I can't believe Gretta did not invite me to her birthday even though we know each other very well.
The tone for this would be mad, outraged, or just a negative emotion because it contains negative words such as "not" or "can't".
Answer:
We can't do that it's too dangerous
Explanation:
It's grammatically correct
