Explanation

Amazon WorkSpaces is the correct answer because it is AWS's fully managed Desktop-as-a-Service (DaaS) solution that allows companies to provision virtual desktops in the cloud.

Service Analysis:

• Amazon WorkSpaces: Provides cloud-based virtual desktops that can be accessed from various devices, offering a fully managed desktop experience for employees.

Why other options are incorrect:

• AWS Config: A service for assessing, auditing, and evaluating configurations of AWS resources - not related to virtual desktops
• Amazon Elastic Container Service (Amazon ECS): A container orchestration service for running Docker containers - used for applications, not virtual desktops
• Elastic Load Balancing (ELB): Distributes incoming traffic across multiple targets - used for load balancing, not desktop provisioning

Amazon WorkSpaces eliminates the need to procure and deploy hardware or install complex software, providing a secure, managed desktop computing service in the AWS Cloud.