Which element in a story is generally useful for descriptions of settings and feelings?

Narration is the element of a story that is typically the most useful for describing setting and feelings.

the narrator can easily describe what the characters are seeing or the place the action is happening so that the reader gets a sense of setting. Also, while the characters might reveal some of themselves and their feelings through dialogue, the narrator usually has more insight or truth in directly describing what each character is feeling in each moment.