What key feature does XML provide in data handling?

XML, or eXtensible Markup Language, provides a key feature of integration between diverse systems. This is primarily due to its ability to define custom tags and structure data in a way that is both human-readable and machine-readable. As a result, XML is highly versatile and can be used across different platforms and applications, enabling disparate systems to share and understand the data seamlessly.

By facilitating this integration, XML allows organizations to exchange information between different software applications, databases, and even services without being tied to a specific technology or programming language. This interoperability is crucial in a world where many systems must communicate with each other, such as in web services, data interchange formats, and configuration files.

The other options do not accurately describe the primary strength of XML. For example, while it might seem that XML could enhance security for financial data, security is more about protocols and encryption methods rather than the structure of the data itself. Similarly, XML is not inherently focused on creating user-friendly web designs or developing rapid manufacturing capabilities; these areas involve different technologies and considerations that go beyond the scope of what XML is designed to do.