The correct choice is AWS Organizations. AWS Organizations enables programmatic creation of new AWS accounts via APIs like CreateAccount and lets you group accounts into organizational units for centralized governance and consolidated billing.

AWS Organizations provides service control policies to enforce guardrails across accounts and it integrates with AWS Control Tower when you need landing zones and prebuilt guardrails while still relying on Organizations for the underlying account management.

Amazon QuickSight is a business intelligence and dashboard service and it does not provide account provisioning or centralized multi account governance features.

Amazon Connect is a cloud contact center solution and it does not offer capabilities to create AWS accounts or apply organization wide governance.

Amazon Lightsail focuses on simplified compute and networking for small deployments and it does not include APIs or features for creating or managing multiple AWS accounts.

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