Answer:
Social referencing
Step-by-step explanation:
Social referencing is a process by which infants use an adult's emotional demonstration to regulate their behaviors or disposition towards people, situations or objects in their environment. In other words, infants make use of information from adults facial expressions to help them understand and make decisions about their environment.
Quimby relaxed when she saw her mothers friendly disposition towards the stranger, she was able to process that the stranger was not to be afraid of.