Answer:
girls had laughed a little nervously
Step-by-step explanation:
Indirect characterization is the process of characterization in which the personality of the character is portrayed through appearance, action, and speeches. The audience gets to know about the character through other ways. The dialogues, setting and the scenes help in the characterization of a character. From the given excerpt the phrase 'girls had laughed a little nervously' is an example of indirect characterization.