What functionality does AWS Organizations enable?

AWS Organizations is a service that provides centralized management of multiple AWS accounts. It enables users to organize their accounts into a hierarchical structure, making it easier to manage permissions and billing across various accounts within an organization. Users can create organizational units (OUs) to group accounts, apply policies to those accounts or OUs, and streamline governance through features like Service Control Policies (SCPs). This centralized management is beneficial for businesses that operate multiple accounts for various teams or projects, allowing them to maintain oversight and control over their cloud resources effectively.

The other options do not align with the primary functionality of AWS Organizations. Automatic scaling of applications relates to services like Amazon EC2 Auto Scaling, while machine learning model development typically utilizes services such as Amazon SageMaker. Secure networking configurations are more concerned with services like AWS VPC and AWS Security Groups, not with account management. Thus, the correct answer emphasizes the core capability of AWS Organizations to manage multiple AWS accounts centrally.