These types indicate the main carriage of shipment enquiries.
If your shipment is multimodal, first you should choose the main carriage from the available enquiry types and then you can define pre-carriage or post carriage addresses.
If the shipment is Ex-work or DDP, then you can choose the required customs formalities in origin or destination. If the shipment is a Door-to-door, you should define pre-carriage, post carriage addresses, customs formalities requirements in origin or destination.