Which aspects of a story best the reader understand the author’s purpose?

The plot and setting.

Explanation:

The plot tells what the book is about and the setting tells where it takes place. It might be a poverty setting like if the book is about the ghetto.

Plot, setting and tone.

Explanation:

When creating stories, authors have a reason, a purpose to do so, which they hope it can be correctly delivered through their writing. Through plot, setting and tone this purpose can be easily found.

none because there is no words that describe a noun and give a mood