Which technology is primarily used to manage the content of relational databases?

The correct choice is MySQL because it is a powerful open-source relational database management system (RDBMS) that is specifically designed to handle the storage, retrieval, and manipulation of data in a structured manner using SQL (Structured Query Language). MySQL allows users to create and manage databases, execute complex queries, and maintain data integrity within relational databases, making it a widely adopted solution for backend database management in various applications.

In contrast, JavaScript and HTML primarily serve different purposes in web development. JavaScript is mainly used for client-side scripting to add interactivity and dynamic content to web pages, while HTML is the standard markup language for creating the structure of web documents. PHP is a server-side scripting language that works well with databases, including MySQL, but it does not manage database content directly; rather, it facilitates the interaction between the web server and the database.