Which is used in SOAP headers?

SOAP (Simple Object Access Protocol) headers are extensible elements that carry metadata about the message. Security information is commonly placed in SOAP headers to support authentication, authorization, encryption tokens, and digital signatures without modifying the message body. This separation allows security processing to happen independently of the business logic in the SOAP body. The other options (postal address, response information, stock request) are typically part of the application payload rather than header-level metadata. Headers are specifically designed for cross-cutting concerns like security, routing, and transaction management.