Can you upload a picture of what you're talking about?
I would say the correct answer is girls had laughed a little nervously.
Based on this clause, we can deduce something about their personality, and that is that they are happy kids who want to laugh all the time but they are not allowed to. The other options are either direct characterization or not characterization at all.
Answer : While camping this summer, I did not like the insects nor did I like sleeping on the ground
Explanation : Pretty sure he’s still camping during the summer so it’s while camping this summer instead of I went this summer
The people who stole bodies or body parts from cemeteries to help science were called 'Grave Robbers'