Here's why:
* Word choice refers to the specific words a writer or speaker selects.
* Meaning of the words refers to the understanding of the chosen words.
* Level of formality refers to the style of language used, ranging from casual to formal.
* Vocabulary refers to the range of words a person knows and uses.
Pronunciation, however, is about the way words are spoken, not the words themselves. It doesn't directly impact the meaning or choice of words.
Let me know if you have any other questions!