Answer: See explanation
Step-by-step explanation:
The tiny white kitten" is a (phrase) that serves as the (subject) of the sentence.
The head word of the phrase is the word ("kitten.")
All of the other words in the phrase (modify) the head word.
Note that the subject refers to the one who commits an action. The tiny white kitten" is regarded as a phrase as the group of words come together as a single unit.