Answer: The main purpose of the rising action in a short story is to build interest and suspense. In the rising action, a series of events build toward the point of greatest interest. The rising action of a story is the series of events that begin immediately after the exposition (introduction) of the story and builds up to the climax.
Seeing as you’ve supposedly read this story, I recommend analyzing the text briefly before writing your narrative (mini story from the perspective of Grendel)
Use your imagination to turn Grendel into whatever you want while maintaining facts.
It actually isn’t too difficult. It shouldn’t take long. Let your creativity thrive!
My guess would be to "tolerate", hope this helps
Lack, want, need, require as verbs all stress the absence of something desirable, important, or necessary. Lack means to be without or to have less than a desirable quantity of something: to lack courage, sufficient money, enough