You have explain about cross asset correlation in your clear words and you have given an understanding of diversified default folio in your very simple words that it is a portfolio and just like wallet which have diversification of assets like cryptocurrencies and stocks etc.

It would be more good if you also add some of the charts and real world examples in it also but overall it was a good understanding and it is unfortunate that your post is invalid entry because of a reason that you are out of club.