The first person POV of telling a story is by using the words I, we, my, etc. in the point of view of the narrator. This way of story-telling can be written in a variety of ways such as a first person protagonist, first person witness, re-teller of a story in first person, etc. Therefore, it is true that most authors who write in first person use the protagonist to tell the story as this is very much possible. Even I have written a couple of first person point of view stories as the protagonist!
I hope I was able to satisfyingly answer your question. Good luck! :)
After all went dark, the walls opened to reveal glass all around.
Based on a strong regular pattern of movement or sound
Due to the changing of water levels plant life is unable to grow on the shores
maybe you've been invited to a party of a distant friend. while there, you meet someone who you'd never though you could be friends with. someone wayyy too different than you? but you two hit it off and they tell a really funny joke, hence where you'd use the line "i've never laughed so hard in my life."
hopefully this helps or gives you some sort of idea!
