In the sentence "Freezing rain makes the roads very slippery," the participle is "freezing." It functions as an adjective, describing the noun "rain."
So, to clarify:
- "Freezing" - participle functioning as an adjective
- "rain" - noun
- "makes" - verb
- "slippery" - adjective
The correct answer regarding the participle in your sentence is "freezing" as an adjective.