Here's why:
* Predicate: The predicate is the part of a sentence that tells us what the subject does or is. It always includes the verb and any other words that modify the verb.
* Subject: The subject of the sentence is "The strong wind".
* Verb: The verb is "blew".
* Object and Prepositional Phrase: The rest of the predicate, "my scarf away", tells us what the wind did to the scarf. "My scarf" is the direct object, and "away" is part of a prepositional phrase that modifies the verb.
Therefore, the complete predicate is "blew my scarf away".