Correct Answer: ATo meet the requirements of monthly backups with a retention period of 7 years and transitioning to cold storage after 6 months, the appropriate solution is to use AWS Backup. AWS Backup allows for the creation of backup plans that can be scheduled to run automatically on the first day of each month, includes lifecycle policies to transition backups to cold storage after a specified period, and can set retention periods for backups. This approach ensures the backups are automated, consistent, and managed without additional scripting or manual intervention.