Which AWS service helps set up and govern a new multi-account environment for a company with multiple accounts and teams?

AWS Control Tower is the correct answer because it provides a straightforward way to set up and govern a secure, multi-account AWS environment. It automates the creation of a landing zone, implements best practices for security and compliance across accounts, and offers guardrails to maintain governance. AWS CloudFormation is an infrastructure as code service used to provision and manage AWS resources, but it doesn't inherently set up a multi-account environment with governance. AWS Config is a service that assesses, audits, and evaluates the configurations of your AWS resources, focusing on compliance and security, but it doesn't create the multi-account structure itself. Amazon VPC allows you to provision a logically isolated section of the AWS Cloud where you can launch AWS resources in a virtual network that you define, which is a networking service, not an account governance service.