Final answer:
The absolute phrase in the sentence "Her fur matted and her legs shaking, the lost puppy finally found her way home." is "Her fur matted and her legs shaking."
Step-by-step explanation:
Phrases are groups of words that function as a single unit within a sentence but do not have both a subject and a verb.
The absolute phrase in the sentence "Her fur matted and her legs shaking, the lost puppy finally found her way home." is "Her fur matted and her legs shaking."