Answer:
When Grendel says Unferth's "beard and hair hung straight down like seaweed" Figurative language is being used. The correct answer is A.
Step-by-step explanation:
Figurative languages uses figures of speech to be more effective, persuasive and impactful. In this case, the author uses similes to compare the beard with seaweed in order to generate a clear image of the beard in the reader's mind. By using this comparison, the reader understand perfectly how Unferth's beard looks like.