XML
JavaScript
JSON
AJAX
Explanations:
XML (eXtensible Markup Language) is not the format used for AWS IAM policy statements. IAM policies are not structured in XML.
JavaScript is a programming language and is not the format used for AWS IAM policy statements. IAM policies are not defined in JavaScript syntax.
JSON (JavaScript Object Notation) is the correct format for AWS IAM policy statements. Each individual statement in the policy is represented as a JSON object enclosed in braces{ }.
AJAX (Asynchronous JavaScript and XML) is a technique used for web development and is not relevant to the structure of AWS IAM policy statements. IAM policies are not defined using AJAX.