Answer: AWS Firewall Manager

AWS Firewall Manager is the correct service for centrally configuring and managing security groups across multiple AWS accounts within an organization. It provides: - **Centralized management** of security groups across multiple AWS accounts - **Policy-based configuration** for security groups - **Integration with AWS Organizations** for account management - **Automated enforcement** of security policies **Why other options are incorrect:** - **Amazon GuardDuty**: A threat detection service that monitors for malicious activity and unauthorized behavior - **Amazon Detective**: Helps analyze security findings and identify root causes of security issues - **AWS WAF**: A web application firewall that protects web applications from common web exploits AWS Firewall Manager specifically addresses the requirement for centralized security group management across multiple accounts in an organization.

Author: Ritesh Yadav