Answer:
The participle phrase in the sentence is "having made his point."
Explanation:
Participle phrases always begin with a participle, either present or past. A present participle is formed by adding -ing to the base form of a verb. Besides the participle, the phrase will have modifiers and/or objects. Participle phrases function as adjectives, modifying a noun in the sentence in which they are included.
Int he sentence, "One man, having made his point, walked away happy," the participle phrase is "having made his point." It begins with the present participle "having", and it modifies the noun "man".
