In 2009, there was a negative increase in teenagers' mental health issues since depression thoughts were more common.
This concept refers to emotional and psychological well-being as people can value themselves and can cope with regular negative situations.
In general, mental health issues have increased overtime, specially in vulnerable populations such as teenagers. Due to this general trend in 2009 it was reported:
Note: This question is incomplete because the text it refers to is not provided; due to this, the answer is based on general knowledge.
Learn more about mental health in: https://brainly.com/question/18216607
#SPJ1