Final answer:
Three parts of this Beowulf excerpt relate to a warrior code: seeking revenge for a friend, striving for glory before death, and fulfilling one's duty as a warrior.
Step-by-step explanation:
Three parts of this excerpt from Beowulf relate to a warrior code. The first part is when Beowulf says, 'His friend to avenge than with vehemence wail him.' This shows the importance of seeking revenge for one's friend, which is a key element of the warrior code. The second part is when Beowulf says, 'Each of us must the end-day abide of His earthly existence; who is able accomplish Glory ere death!' This emphasizes the warrior's desire for glory and the need to accomplish great deeds before death. The third part is when Beowulf promises to track down and defeat Grendel's kinsman, showing his determination and commitment to fulfilling his duty as a warrior.'