Why do writers choose a specific form of writing?

They do this because it helps them know what going on throughout and the book and helps them not get confused.

Explanation:

To explain this why they do this is because it helps the reader know what they are specifically talking about and it also lets the reader know that what they are talking about is the main subject.

apprenticeships are formal, paid, long-term training programs that provide valuable classroom instruction coupled with on-the-job training for skilled, high-paying jobs.