Final answer:
The correct participle phrase is A) "The baby crying frantically had a fever.", where "crying frantically" is an adjective modifying "the baby". Participle phrases can also function adverbially in a sentence, such as in the example "Skipping along the forested path."
Step-by-step explanation:
The correct participle phrase is A) "The baby crying frantically had a fever." Here, the phrase "crying frantically" is modifying the subject "the baby" and is functioning as an adjective. In contrast, "Sally was crying frantically" (B) and "The children were crying frantically when they missed the bus" (C) do not contain participle phrases; these are simply clauses with "crying" as the main verb.
An example of a participle phrase functioning adverbially is: "Skipping along the forested path, the dwarfs whistled in a merry chorus." Here, the phrase modifies the verb "whistled", indicating how the action is being carried out.
For regular verbs, the past participle is typically formed by adding "-d" or "-ed", for example, "I bake/I baked/I have baked".