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).
Earth's, because by adding the 's, it shows possession.
<span>Satire is taking real world events and exacerbating the shortcomings. The word "modest" indicates to the reader that the material they are about to read is anything but modest.</span>