Answer: Personification
Explanation: This is because it is giving acid a characteristic of something living.
What? wheres the question?
The answer is cheerful and upbeat.
Grendel attacks Heorot and devours the first warrior he encounters, when he tries to grab the second warrior, Grendel is shocked when the warrior grabs him back with great strenght (by the time the reader discovers this warrior was actually Beowulf).
