Which AWS service should the company use to perform these tasks?

Explanations:

AWS Shield is a security service designed to protect applications from DDoS attacks. While it provides some level of protection, it does not manage or maintain critical business applications, making it unsuitable for the company’s needs.

Amazon RDS (Relational Database Service) is a managed database service that simplifies database management tasks such as backups, patching, and scaling. However, it does not encompass overall management and protection of critical business applications, so it does not fully meet the requirements.

AWS Config is a service that enables the assessment and monitoring of AWS resource configurations. It helps in compliance and governance but does not provide management or protection for applications, which is what the company needs.

AWS Managed Services (AMS) offers a comprehensive management solution for AWS resources, including infrastructure management, application monitoring, and operational support. This service is designed for organizations that lack the staffing resources to manage their critical applications effectively, making it the best fit for the company’s requirements.