Explanation:
The narrator speaks to the reader, saying, "as you I will apprise." Then, two lines later, this context clue appears: "Before yet farther in this tale I place." This clue suggests that "apprise" is a verb that gives some information to the reader before too much time passes.
There are several things that distinguish heroes from monsters, especially in classical literature. Heroes and monsters are very highly contrasted through the dichotomy of good and evil. Heroes are often wholly good; monsters are often wholly evil. Being "good" entails protecting the wellbeing of others, and being "evil" means causing destruction and harm to others. They are also very starkly different in their physical appearance and personal attributes. Heroes, especially Beowulf, are bold, strong, physically fit, usually handsome, brave, wise, etc. Monsters are usually grotesque, horrifying, oversized, etc. Hope this helps.
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