Underextension refers to the incorrect restriction of the use of words, which is generally observed in young children.
When a child uses the word "cat" to refer to the family cat but not any other cats, <u>underextension </u>occurs.
Underextenstion can be defined as:
1. Underextensiotn refers to when a child refers to the object or specific thing to apply to their specific object only instead of others.
2. The example of underextension is the term cat or dog used by the children. In this context, the cat or dog is only referred to as a family pet instead of applying to all the cats or dogs.
Thus, the correct answer is underextension.
To know more about underextension, refer to the following link:
brainly.com/question/1156400