What is the primary function of the AWS Mobile SDK for iOS?

The primary function of the AWS Mobile SDK for iOS is to enable mobile applications to connect with various AWS services. This SDK simplifies the process of integrating mobile apps with AWS backend services, allowing developers to use cloud capabilities such as authentication, storage, database services, and more directly within their iOS applications. By providing a set of libraries and tools tailored for mobile development, it streamlines the complexity involved in accessing AWS services, thus enhancing the overall development experience for mobile developers.

The other options relate to different functionalities or services. For instance, virtual reality experiences, while they may use cloud services, are not the focus of the AWS Mobile SDK for iOS. Similarly, coordinating distributed application components typically refers to services like AWS Lambda or AWS Step Functions, which facilitate running and managing distributed applications but aren't directly tied to mobile development. Finally, the facilitation of message queuing for microservices is more aligned with services like Amazon SQS or Amazon SNS, which are designed for messaging functionality rather than mobile app integration.