it's asking you to explain the importance of providing services around children/yp.
So as well as stating there are a range of services (which they didn't ask for but you do need to give examples) you need to say something such as '..... with more mothers working these days, very often both sets of parents are at work until the early evening, and services such as an after school club is important for children who may in the past have gone home (latchkey kid) to an empty house. After school clubs provide......... which benefits children/yp by..... Or you could write of a children's centre and what services they offer for young children and how important it is to their development etc
They want to know why is it important for children and young people so think of the reasons children need services designed around them and then the services will come easily. So think or environment - home parents - young, poor parenting skills, drug users/alcoholic/smokers, poor diet, poor housing/damp etc, deprivation/poverty/ special needs/isolation (i.e.high rise flat)/chronic illness/often hospitalised/language barrier/cultural etc.
I hope this helps get you thinking.