In the poem Beowulf, how does Grendel's demeanor shift during the battle?

the correct answer is:

this is an example of the writer telling through description rather than showing through dialogue.

sometimes writers like to explain explicitely what's happening instead of adding dialogues of the situations., which is the case in this passage,

motion can be transfered from one object to another by having an objetct in motion push or hit it

answer: may i see the sentences?