They are different types of heroes; Beowulf is a warrior, and Sir Gawain is a knight. ... Beowulf follows the heroic code which values strength, honor, and courage. Sir Gawain follows the code of chivalry and values being honest, humble, loyal, pious, and having integrity.
Answer:
even-handedness or impartiality
I believe it is B - It provides momentum throughout the poem.
(please let me know if I am wrong, also I apologize in advanced just in case it is wrong.)