Answer:
Negative affect, interpersonal and intergroup conflict, and possibly psychological distress increase with rising temperature. Droughts, floods, and severe storms diminish quality of life, elevate stress, produce psychological distress, and may elevate interpersonal and intergroup conflict.
Explanation:
The two reason are development and if a event happens to the character, the character would change his attitude toward life, like someone dying would change the tone of the story.