Final answer:
The author compares Theodoric to a "hunted beast" to emphasize his desperation in a moment of frantic urgency.
Step-by-step explanation:
The comparison of Theodoric to a "hunted beast" in the sentence, "Like a hunted beast breaking cover and dashing madly toward some other haven of momentary safety he threw aside his rug, and struggled frantically into his disheveled garments," from the story "The Mouse" serves to emphasize his desperation. The author uses this simile to convey the character's intense urge to escape an uncomfortable situation, much like a prey animal might frantically attempt to evade its predators. The term "hunted beast" suggests a primal and urgent response to stress, highlighting Theodoric's frantic state as he struggles to dress himself.