BUFFETED by the storm is the participial phrase and the word modified is SHIP
Explanation:
Participle Phrases are verb form of words that are used as adjectives or play the role of adjective in a sentence modifying either the noun or pronoun.
Participles phrases begin with either present participle or past participle. For example:
Present participle are words that end with –ing (for example: The FASCINATING story)
Past participle are words that end with –ed, -d, -n, -t, or –en (for example: the WASHED clothes).
In the above example, noun is the “SHIP” and “BUFFETED” is the past participle. Hence, the participle phrase “BUFFETED BY THE STORM” modifies the noun “SHIP”