Solution:A. (p, b, m) - III: Bilabial → Produced with both lips (e.g., /p/, /b/, /m/ are bilabial sounds).
B. (p, b, t) - IV: Stop → Stops involve complete closure of the airflow, as in /p/, /b/, and /t/.
C. (i, e, y) - I: Sonority → Vowels are the most sonorous sounds, with /i/, /e/, and /y/ being highly resonant.
D. (q, s, f) - II: Fricative → Produced with a narrow constriction causing turbulent airflow (e.g., /s/ and /f/ are fricatives).