New Items in the Background Setting that's confusing me

The new Anniversary Update is showing new items in the Background options that weren't present in version 1511.
It's confusing me and I'm not sure if it's a good idea to not allow them to run in the background.

You'll find these in Settings > Privacy > Background Apps

If they were hidden from sight before, why show them now? LOL

These are.

- Content Delivery Manager
- Email and accounts
- RingtoneApp.WindowsPhone
- Store Purchase App
- Windows Default Lock Screen
- Work or school account
- Xbox Identity Provider
- Your account

Is there any here that I should allow to run in the background?

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