Which sentence contains a participle functioning as a verb?

The students are waiting for the bus.
The students are waiting for the bus.

Mateo will only eat cooked carrots.
Mateo will only eat cooked carrots.

David brought coloring books to the restaurant.
David brought coloring books to the restaurant.

The blinking sign warns drivers of a sharp curve ahead.

The blinking sign warns drivers of a sharp curve ahead.

The sentence "The blinking sign warns drivers of a sharp curve ahead" contains a participle functioning as a verb. The participle is "blinking" and it is functioning as the verb in this sentence.

The sentence that contains a participle functioning as a verb is "The blinking sign warns drivers of a sharp curve ahead."

To identify the participle functioning as a verb in this sentence, you can follow these steps:
1. Look for a word ending in "-ing" or "-ed."
2. Determine if the word is used as a verb or an adjective.
3. If the word is used as a verb, it is a participle functioning as a verb.

In this case, the word "blinking" ends in "-ing" and is describing the sign's action of warning. Therefore, "blinking" is a participle functioning as a verb.