Final answer:
Fronting is a speech pattern where sounds produced at the back of the mouth are substituted with those made at the front, such as saying 'tat' for 'cat'. It's common in young children's speech development.
Step-by-step explanation:
The developmental speech pattern known as fronting corresponds to the description d) Pronouncing sounds from the back of the mouth at the front.
Fronting is a typical phonological process in young children where they replace sounds that are typically made in the back of the mouth, like /k/ and /g/, with sounds made in the front of the mouth, like /t/ and /d/. For example, a child might say 'tat' for 'cat' or 'dirl' for 'girl'. This type of articulation process is commonly observed in early language development, and most children eventually outgrow this as their speech and pronunciation skills mature.