In what case is a sample survey carried out ? Explain its need.

The observed changes of youth risk behavior survey addendum since the year 2002 are ;

Explanation:

Sucide cases by the youth lead to premature deaths .Such decisions are as a result of depression as a result of social issiues .

Drug and substance abuse is a risky behaviour by the youth which leads to health conditions and drastic change of behaviour .

Adolescent youths undergo psychosis whereby the young adults are at a risk of behavioural changes .