Final answer:
The 'snarl' of the wolves and the 'growl' of the bear are literary representations of animal vocalizations exemplifying fear and the survival struggle in nature.
Step-by-step explanation:
In the context of the excerpts provided, the "snarl" of the wolves and the "growl" of the bear represent types of animalistic communication or vocalizations. These sounds serve to exemplify the nature, red in tooth and claw concept, often illustrating the struggle for survival in the wild. Moreover, the use of these sounds as literary devices underscores the fear and threat these creatures can embody in stories and myths, as seen with the night-hags and werewolves mentioned in the context of Roman fears. Such imagery is powerful and remains evocative over time, especially when animals are anthropomorphized or used symbolically, as with the figure of Smokey the Bear.