Level 2 Award. Certificate and Diploma in ChildCare - All Help Appreciated Seriously.

Unit 2 - The Developing Child - I need some serious help on this

The first question is: D1 describe the expected stage of social development chidren aged 4. and then D2 is the same question but for children aged 5.
D3: Describe one suitable method of observing and recording the social development of children aged 5.
D4: Explain one advantage and one disadvantage of this method of observing children
D5: Identify the main influences that may affect the social development of children.
D6: Describe how snack and mealtimes can support the social development of children.

I would appreciate all help that i can get even if its a little bit, because i am really struggling. As you can see all the D's are about social development in children aged 4-5 so if you can give me any information about social development that would be highly appreciated.