Read the excerpt from Grendel.

It wasn’t because he threw that battle-ax that I turned on Hrothgar. That was mere midnight foolishness. I dismissed it, thought of it afterward only as you remember a tree that fell on you or an adder you stepped on by accident, except of course that Hrothgar was more to be feared than a tree or snake. It wasn’t until later, when I was full-grown and Hrothgar was an old, old man, that I settled my soul on destroying him—slowly and cruelly.

What does the author use in this excerpt to develop Grendel’s character?

Grendel’s words
Grendel’s thoughts
Hrothgar’s words