Hello Asad,
You have now a 1-1 association between your entities meaning there can only be one comment related to your RiskManagement entity.
There are several ways to achieve what you want, I suppose the most easiest way is changing the association from 1-1 to 1-*(RiskManagement can have multiple comments) and adding a DateTime attribute which is filled with the currentdatetime when you create the entity (or use a system member but that is less flexible). Than for dataview and listviews you can use a datasource that sorts the comments on date, you can do for example a head to pick the first one and than show in a dataview to show the rest in a listview.
Good luck!
Kind regards,
Thijs