A company has an application that uses an AWS Lambda function to consume messages from an Amazon Simple Queue Service (Amazon SQS) queue. The SQS queue is configured with a dead-letter queue. Due to a

Using the SendMessageBatch API, the developer can programmatically read messages from the dead-letter queue and send them back to the original SQS queue in batches. Once the messages are in the source queue, the Lambda event source mapping will automatically pick them up and process them with the fixed code.

ChangeMessageVisibility changes how long a message is invisible to consumers but does not move messages out of the dead-letter queue back to the original queue for reprocessing.

StartMessageMoveTask is used to move messages between queues in supported scenarios, but option A (SendMessageBatch) is the direct, widely supported API call for manually requeuing DLQ messages to the source queue.

PurgeQueue permanently deletes all messages in the dead-letter queue without processing them, which would result in permanent data loss.