Match the following phonetic terms with their correct descriptions:
1 - Alveolar Ridge 2 - Nasal Cavity 3 - Phoneme 4 - Glottal Stop
a - A sound produced by obstructing airflow in the vocal tract, causing air pressure to build up and then be released
b - The small ridge located just behind the upper front teeth
c - The smallest unit of sound that can change the meaning of a word
d - A passage located behind the nose that is involved in the production of nasal sounds