Em dashes are meant to indicate brief pauses within a running sentence. If you were to include one within a quote, it would go wherever a person pauses for an extended period of time (at least longer than the person would normally take to start their next word).
In your first answer choice, the reader is put under the impression that the em dashes used between "I", "uh", and "am" are pauses, as if Carla was at a brief loss for words. Since she likely paused and said "uh" while thinking of the next thing to say, this is the correct use of the em dash.
In your second answer choice, an em dash wouldn't be appropriate. It's not likely that Bianca would stop her sentence midway, pause, then tell Nawal to duck before the frisbee would hit his head. She likely stopped her sentence and immediately told him to duck instead.
In your third answer, this sentence doesn't even require a dash anywhere. There isn't a need for a pause between "shrieked" and "Laura".
In your fourth answer, this is also an incorrect use of an em dash. There wouldn't be a dash before "exclaimed" in this sentence.
But, A rising action is usually when the story would start to get tense an example from "Of mice and men" When Curley's wife was getting choked by Lennie, It was like a rising action, As it was tense and could leave you on the edge of your seat
It is important to laugh because of these reasons. Laughing<span> lowers blood pressure Reduces stress hormones Increases muscle flexion Increases the circulation of antibodies in the blood stream Makes us more resistant to infection.</span>
