Final answer:
Yes, messages can be shared between queues in different regions using cross-region replication.
Step-by-step explanation:
Yes, it is possible to share messages between queues in different regions.
When using a message-queuing system like Amazon Simple Queue Service (SQS), you can create queues in different regions and configure cross-region replication. This allows messages sent to one queue to be automatically replicated and delivered to another queue in a different region.
For example, if you have a distributed application running in multiple regions and you want to ensure high availability and fault tolerance, you can set up cross-region replication for your SQS queues. This way, if one region goes down, the messages can still be processed in another region.