In the phrase “good boy,” [d] becomes [b]. What type of assimilation is this?
Labialization
In “ten men,” the sound [n] becomes [m]. What causes this change?
The following bilabial sound [m]
In “good girl” → [gʊg gɜ:l], the alveolar [d] becomes [g]. What kind of assimilation is this?
Velarization