Answer:
Social referencing
Step-by-step explanation:
Social referencing is the phenomenon in which an infant used the effective display of the adult so that they can regulate the behavior towards the environmental objects, situation, and the person.
With the help of social referencing infants learn or come to understand that how is the world is around them. In the first half of the year, the infants start interpersonal communication with objects, things, and the environment.
The food differences between Rodney and Sarah's preferences were social referencing.