Final answer:
Advay's emotional cleansing in response to Boromir's death in The Fellowship of the Ring is called catharsis.
Step-by-step explanation:
In The Fellowship of the Ring by J.R.R. Tolkien, when Advay is very saddened by Boromir's death, the emotional cleansing that takes place is called catharsis. Catharsis refers to the release of strong emotions and is a common element in literature and drama. It allows audiences or readers to experience a purging or purifying effect, relieving them of their own negative emotions.
Learn more about Catharsis in literature and drama