How does a authors choice in language impact them in a literary work

There choice in language impact them in a literary work by getting them into what they are writing and there language intrigues the reader

Mood: How you feel after reading.

Theme: What the story is "trying" to make you feel.

The authors choice of language try to work hand in hand with one another. If they write a sad themed story, then they are trying to change your mood to feel sad.

makes sense?