Final answer:
The use of plot in the excerpt contributes to a tone of grief.
Step-by-step explanation:
The use of plot contributes to the tone of grief in the excerpt. Through the plot, the reader observes the events and emotions experienced by the speaker. The mention of the altar, the portrait, the mother's chant, and the speaker's inability to look into Father's eyes all contribute to a somber and mournful tone.
Learn more about Contributions of plot to tone in literature