Which group of sounds includes /m/, /n/, and /ŋ/?

The group of sounds that includes /m/, /n/, and /ŋ/ is classified as nasal sounds. These phonemes are produced with a significant airflow through the nasal cavity, as the oral cavity is obstructed at different points in the mouth.

• The /m/ sound is a bilabial nasal, where both lips come together to stop the airflow, while the velum is lowered to allow the air to pass through the nasal cavity.
• The /n/ sound is an alveolar nasal, produced by blocking the airflow at the alveolar ridge (the bumpy area just behind the upper front teeth), also allowing the air to escape through the nose.
• The /ŋ/ sound, as in the word "sing," is a velar nasal; here, the back of the tongue contacts the soft palate, again permitting the airflow to be redirected through the nasal passages.

The distinction of nasal sounds from other groups such as stops, fricatives, and affricates is critical. Stops involve a complete blockage of airflow followed by a release; fricatives involve turbulent airflow through a narrow constriction; and affricates combine a stop and a fricative in a single sound. The characteristic of nasal sounds—spec