Final answer:
Literature often explores the complex relationship dynamics within families, particularly how sisters exhibit resentment toward their parents' treatment of their siblings through a range of actions from passive-aggressive responses to overtly defiant acts.
Step-by-step explanation:
In various pieces of literature, sisters have demonstrated their resentment towards the differential treatment of siblings in unique ways. Responding to favoritism or neglect by parents often involves subversive or direct actions by the sister character. For example, a sister silently showing sweet smiles as mentioned, can imply a passive-aggressive stance, suggesting her disagreement without openly confronting the parents. In contrast, a sister may take a more drastic measure as in the instance of defying the king and burying her brother, which displays overt resistance and acts of defiance.
At times, sisters in literature may exhibit compassion towards siblings who are treated unfavourably, such as by offering reassurance and attempting to make a comfortable home, signifying a supportive role despite their own reservations. Gender dynamics and societal roles often play a significant part in these narratives, highlighting the complexities of familial relationships and individual responses to perceived injustices within the family.