Introduce 'rapid population growth'

So im writing an editorial and i need understanding what this verse means from a song lyric. the editorial is about depression but i need understanding what this could mean “her feelings she hides, her dreams she can’t find. she’s losing her mind. she’s fallen behind. she can’t find her place. she’s losing her faith. she’s fallen from grace. she’s all over the place.”

Sarah’s friend had been binge drinking and was intoxicated. sarah immediately called 9-1-1, and then sarah tried to keep her friend awake and her sit up.

Which is not a physical sign of stress? a )pupils dilate b) breathing becomes faster and deeper c) kidneys and liver constrict d) spending money