Answer:
It has the function of establishing a conflict in the narrative.
Step-by-step explanation:
The rivalry between the families of Romeu and J * has the literary function of establishing a conflict within the narrative. This conflict establishes a challenge that the characters need to overcome in order to reach their goals and enjoy full happiness.
The creation of a conflict allows the reader to be instigated and curious about the resolution of the facts covered in the narrative, in "Romeu e J *" this is no different, reaching the point of surprising the readers, once they reach the resolution of the conflict.