Hi Stumpy - When I did the CWDC we were not restricted to the size of our answer and we could write as much as we liked as I did it on line. I did this so long ago and do not have a copy to hand but from memory here goes!
I think I approached this question from several directions - the first was looking at child development from Maslow's hierarchy of needs i.e. the child, in order to develop through many stages to a fully functioning adult needs to have all basic needs met in the first instance i.e. biological needs for food, shelter, sleep etc must be met for a child to survive. Building on that need being met, the next stage to help the child develop is keeping the child safe and secure, giving rules to live by and order to their lives and limits. The next stage to assist development is satisfying a child's need to feel part of a family and feeling that they belong and have good relationships. Next stage building on the previous ones is achieving good self-esteem and at the pinnacle you have a well-rounded and well developed child who has reach self actualisation and fulfillment. I gave examples along the way of how I achieved each stage with my foster children and how we saw them grow and develop and change into well rounded youngsters who were very much part of our family. We gave examples of how we see them enjoying their lives and achieving what they want to do in life. You can google Maslow's hierarchy of needs.
Secondly, I also looked a child development from attachment theory, and how as carers it was important to be a secure base to help the child develop a sense of safety and trust so they can explore their world and learn new skills, knowing you are there for them. Again, I used personal experiences with my foster children to show how I was a secure base for them when they felt unsure and how they learned to trust and enjoy new experiences over time.
You have identified the importance of your child's heritage and culture and it shows your sensitivity to the needs of your children and your awareness of their development which takes into account their background and birth family. That is a brilliant example and covers it all really. Encouraging your foster child to enter family discussions is all part of attachment (safe, secure base) so you have covered that too.
Also, you are mindful of health of your child and also education and following advices in PEP's and LAC's so really you have covered it all.
I am sure others have some more good ideas for you - hope you get a distinction!!