New Items in the Background Setting that's confusing me

[greedo_greedy]

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?