Final answer:
A kindergarten teacher could best determine if a child has begun to develop phonemic awareness by asking the child to say the word cat, then say the first sound the child hears in the word.
Step-by-step explanation:
A kindergarten teacher could best determine if a child has begun to develop phonemic awareness by asking the child to:
B. say the word cat, then say the first sound the child hears in the word.
Phonemic awareness refers to the ability to hear and manipulate individual sounds in words. By asking the child to say the word cat and then identify the first sound they hear, the teacher is assessing the child's understanding of phonemes, which are the smallest units of sound in a language.