How is an artifact used during the exposition of a storya. to tie up loose ends and explain the consequences for the characters b. to establish the physical appearance of the characters in the storyc. to give clues about the event that will happen later in their story d. to provide important details about the characters and the plot

D. to provide important details about the characters and the plot.

Explanation:

In a story, an artifact is often used as a literary device. This can include any object, action or idea of significance that contributes to moving the story along. An artifact is a useful device as it provides important details about the characters, their actions and personalities, and the plot. This is especially true when used alongside other literary devices.

the correct answer would be:  

a. adverb phrase