How can grief of a death influences a child's social development?

Yes: Depending on circumstances (who died, what age, etc) counseling of child can be very helpful.

Grief: The caregivers grief or the child's grief? For a child the loss of a loved one can be a life-changing phenomena. They can indeed never get over it. Children don't process grief well because the adults don't know how to do it and they can't help the child. Much time has to be spent with child figuring out their emotions and helping them through it. It's never about just getting on with it.