Which data format is used to store data in key-value pairs?

The choice of JSON as the correct answer highlights its design and utility in representing data structures in a lightweight format that is easy for both humans to read and machines to parse. JSON, which stands for JavaScript Object Notation, is particularly well-suited for storing data in key-value pairs, which is a common data representation format in modern web applications, especially when exchanging data between a server and a client.

In a JSON structure, data is organized in a way that clearly associates keys (which represent the identifiers) with their corresponding values (which can be various data types, including strings, numbers, or even nested objects). This makes it highly intuitive to work with, especially for developers who are familiar with JavaScript and object-oriented programming.

Options such as XML, CSV, and HTML serve different purposes and formats. XML (eXtensible Markup Language) is used for defining custom markup languages and can represent hierarchical data but is not inherently key-value oriented. CSV (Comma-Separated Values) is primarily designed for tabular data representation using a flat structure, making it less suited for key-value pairing. HTML (Hypertext Markup Language) is used for structuring web pages and content but does not serve as a data storage format in the key-value