In order to give some ideas to SUPPORT the prompt:
1. The lack of surveillance by parents on many teengers is a widely spread phenomenon in the current society, where usuaylly both parents work and spend a lot of time out of the house and hence, far from their kids. Teenagers are experiencing some years of changes in which they are tempted by drugs, alcohol or bad influences that can favour their participation in violent scenarios. In the absence of someone who can restrain those behaviours is quite more problable that teenagers can end up in delinquency.
On the other hand, some ideas AGAINST the prompt:
Youth delinquency is independent of the constant presence of the parents. Due to to generalized economical downturns it is not easy for the youth to find a job and long unemployment periods can lead to them trying to find an easier solution by participating in illegal activities. Also is true that people with more barriers to enter in the laborforce usually come from lower income families, which live in more insecure neighbourhoods where is easier to have access to illegal networks. Therefore, more arguments in this line could be provided to prove that actually the problem is due to social inequality and not due to mothers entering the laborforce.