Answer:
I think it creates suspense. I think it could also slow the pace but I'm going to stick with it creates suspense. (Or most likely both.)
Explanation:
If you're reading the story in a 1st person, you're having to read how they feel more indepth or in a stronger setting. This can create more suspense within a story such as during the climax more than it would a third person or over groups of characters. It can also very much slow the pace because you have to follow the steps, the story, and the actions of the character. This is my guess, excuse me if I'm wrong.
