IT controls

Hi sir, in my ACCA approved exam kit, there is a question, regarding stating whether the controls are general or application.

Control ;
Authorisation of purchase orders – application

Minimum order quantities – application

Automatic updating of inventory once goods are sold – application

I understand that the first control is an application control because it relates to data integrity; only authorised purchase orders should be processed.

But i dont understand why the other 2 controls are considered application controls sir. Could you explain ?