Why might the poet have chosen to provide such as detailed description of the setting of beowulf's battle with grendel's mother. how does this description influence the reader's impression of the battle

What is the rhyme scheme in this excerpt from longfellow's, "the tide rises, the tide falls? " (10 points) the tide rises, the tide falls, the twilight darkens, the curlew calls; along the sea-sands damp and brown the traveler hastens toward the town, and the tide rises, the tide falls.