Final answer:
A common articulation error on plosive and fricative phonemes is nasal emission, where air escapes through the nose during the production of these sounds. This error can be corrected through speech therapy and exercises.
Step-by-step explanation:
A common articulation error on plosive and fricative phonemes is a. Nasal emission. Nasal emission occurs when air escapes through the nose during the production of these sounds, resulting in a nasal quality to the speech. This error can be corrected through speech therapy and exercises that focus on proper articulation of the sounds without nasal escape.