Final answer:
The father and son motif is exemplified in Beowulf when he becomes a father figure to a young warrior, signifying the theme of mentorship and the replication of warrior culture.
Step-by-step explanation:
The example from the chapter where the father and son motif arises is option d) Beowulf becomes a father figure to a young warrior. This is demonstrated in the latter part of the epic when Beowulf, now a king and an elder statesman, takes on a young warrior as his ward, echoing the mentorship he himself received from Hrothgar. Beowulf's relationship with this young warrior reflects the theme of intergenerational guidance and the replication of the warrior culture. Such motifs are central to the narrative and thematic structure of the text, illustrating the importance of lineage, succession, and the role of the elder as a teacher and protector to the young.