Kevin's mother says that his high-tech aid is not working very well for everyday general activities at school or at home, he has limited access to grammatical markers, and that the words he has access to seem to be inappropriate for his age. what vocabulary needs to be developed?

Vocabulary Spurt

Explanation:

As children get older their rate of vocabulary growth increases. Children probably understand their first 50 words before they produce them. By the age of eighteen months, children typically attain a vocabulary of 50 words in production, and between two and three times greater in comprehension.[5][7] A switch from an early stage of slow vocabulary growth to a later stage of faster growth is referred to as the vocabulary spurt.[A vocabulary spurt often occurs over time as the number of words learned accelerates. It is believed that most children add about 10 to 20 new words a week.

your answer will be c. sorry if im wrong: )