Question: What is the purpose of including the IE in the message when the ESM cause is "#26 insufficient resources"?
Option 1: To request additional resources from the UE.
Option 2: To indicate to the UE that the network has insufficient resources to process the request.
Option 3: To notify the UE that the network is experiencing high traffic.
Option 4: To ask the UE to retry the request later.
Explanation: The inclusion of the IE in the message when the ESM cause is "#26 insufficient resources" serves as an indication to the UE that the network lacks sufficient resources to process the request, allowing the UE to take appropriate action.