Final answer:
The word 'vortex' in 'Grendel' means to create a whirlpool (B) and is derived from a physical motion rather than literally eating greedily.
Step-by-step explanation:
The word vortex, as used in Grendel, based on the prefix "vor-" meaning to "eat greedily", does not relate directly to eating, but rather to a physical phenomenon.
The correct meaning of "vortex" in this context is B) To create a whirlpool.
This definition aligns with the common understanding of a vortex as being a spiraling motion of fluid, such as air or water, which can create a whirling column or ring.
The term is often used metaphorically to describe something that is pulling objects into its center in a manner resembling the physical phenomenon of a whirlpool or tornado.