When a writer focuses on writing from experience and showing insight, he/she is working on
a.
word choice.
c.
sentence fluency.
b.
ideas and content.
d.
presentation.

When a writer focuses on writing from experience and showing insight, he/she is working on "ideas and content", since this would be considered a major structural element of an essay or piece, not something that is in the polishing aspect. 

Same cause im in apex too