Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hello
If you have Msft 365 Family, you definitely do not need Microsoft 365 Basic, that's redudant. Basic is for 100GB OneDrive storage and Family already gives you 1TB of OneDrive storage. They cannot be stacked anyway, so yes, you want to cancel Basic, and you will not lose data, unless the Basic plan is on a different account than the Family plan's account, then make sure you download the data from OneDrive before you cancel.
As for the MS Pro feature, that doesn't ring a bell. Is that the exact product name "Microsoft Pro"? Can you provide the exact full name as it is listed in your account?