Final answer:
Narrators confess due to a mix of emotions and pressures, leading to moments of catharsis where they reveal their truth, driving their character development and the narrative forward.
Step-by-step explanation:
The narrator in various literary excerpts confesses to Mr. Wills or other characters due to a combination of guilt, love, fear of death, and the weight of secrets. These intense emotions and pressures culminate in moments of catharsis where the narrator can no longer bear the burden of silence. In each passage, whether it's driven by rage, jealousy, an urgent need to share suppressed love, or the simple human need to be understood, the narrator reaches a tipping point that compels them to unburden their conscience through confession. The act of confessing serves not only as a pivotal moment for the character's development but also moves the narrative forward, providing new depths and directions to the plot.