Here's why:
* Participial Phrases: These are phrases that begin with a participle (a verb form ending in -ing or -ed) and act as adjectives, modifying a noun or pronoun.
* In this sentence: "Charging at the red cloak" modifies the noun "bull", describing its action.
The complete sentence with the participial phrase:
"Charging at the red cloak, the bull missed his mark."