Which mechanism allows developers to access AWS services from application code?

Explanations:

The AWS Software Development Kit (SDK) allows developers to access AWS services programmatically from application code, making it the correct choice.

The AWS Management Console provides a graphical interface for managing AWS resources but is not designed for programmatic access in application code.

AWS CodePipeline is a CI/CD service for automating code release processes, not for direct access to AWS services from application code.

AWS Config is a service for tracking resource configuration and changes, not for providing programmatic access to AWS services from application code.