The word "cook" is used as a participle in the sentence:
"I peeled seven cooking apples for the apple pie."
Here, "cooking" describes the type of apples, functioning as a participial adjective. However, note that there is a misunderstanding because "cook" itself does not appear in the participle form here. The form "cooking" is the participle related to "cook."
If strictly looking for "cook" as a participle, it appears that there is no sentence where "cook" is used directly as a participle. The correct answer, based on the context of participles, is that "cooking" serves that function in your given examples.