If a company wants to deploy a third-party intrusion-detection solution from its AWS account, which AWS resource should it use?

AWS Marketplace is the correct choice because it is a digital catalog where customers can find, buy, and deploy third-party software, including security solutions like intrusion detection systems, directly into their AWS environment. This simplifies procurement and deployment. AWS Security Hub is a service that provides a comprehensive view of your security alerts and security posture across your AWS accounts, but it doesn't offer third-party software for deployment. AWS Quick Starts are automated reference deployments for key technologies on AWS, often involving multiple AWS services, but they are not a marketplace for individual software solutions. AWS Security Center is not a recognized AWS service; it may be a generic term or a misnomer.