Which AWS service helps developers use loose coupling and reliable messaging between microservices?

Explanations:

Elastic Load Balancing is primarily used to distribute incoming application traffic across multiple targets, such as EC2 instances, containers, or IP addresses. It does not provide messaging or loose coupling between microservices.

Amazon Simple Notification Service (SNS) is a pub/sub messaging service that enables message publishing and delivery to multiple subscribers. While it supports decoupling of services, it is not specifically designed for reliable message queuing, which is essential for microservices communication.

Amazon CloudFront is a content delivery network (CDN) that delivers data, videos, applications, and APIs to users globally with low latency and high transfer speeds. It is not related to messaging or microservices architecture.

Amazon Simple Queue Service (SQS) is a fully managed message queuing service that enables developers to decouple microservices and distribute workloads. It allows for reliable messaging and loose coupling, ensuring that messages are reliably stored and can be processed asynchronously by microservices.