Answer: Amazon Simple Queue Service (Amazon SQS)

## Explanation Amazon Simple Queue Service (Amazon SQS) is the correct answer because it is specifically designed to decouple application components in a microservices architecture. ### Key Points: - **Decoupling**: SQS allows different components of an application to communicate asynchronously through message queues, enabling them to operate independently - **Microservices**: When breaking down monolithic applications into microservices, SQS provides reliable message queuing between services - **Scalability**: Each microservice can scale independently while communicating through SQS queues - **Reliability**: SQS ensures messages are delivered reliably even if services are temporarily unavailable ### Why other options are incorrect: - **AWS Direct Connect**: Provides dedicated network connection from on-premises to AWS, not for application decoupling - **Amazon Lightsail**: Simplified virtual private server (VPS) service for simple web applications - **Amazon CloudWatch**: Monitoring and observability service, not for application decoupling SQS is a core AWS service for building loosely coupled, distributed systems and is commonly used in microservices architectures.

Author: Ritesh Yadav