Grendel is bothered by the singing that comes from Heorot, so he attacks the mead-hall every night for 12 years, hoping that the singing fades away and that the hall is no longer used.
Answer:
The answer is B.Tree
Explanation:
Concrete words/nouns name things we perceive with one of our five senses. We can see, touch, and smell a tree, so the word tree is a concrete word/noun.