Which sound is produced using bilabial articulation?

Bilabial articulation occurs when both lips come together to produce a sound. The sound produced by the letter "P" is an example of bilabial articulation, as it requires the speaker to press the lips together and then release them to create the sound. In contrast, the other sounds, "T," "K," and "H," are not produced with the lips alone. "T" and "K" involve the tongue making contact with other parts of the mouth, specifically the alveolar ridge and the soft palate, respectively. "H" is produced with the flow of air through the vocal tract without any closure, making it a glottal sound. Therefore, the correct choice, "P," exemplifies bilabial articulation as it relies solely on the movement and closure of the lips.