What is a primary purpose of JavaScript in web design?

The primary purpose of JavaScript in web design is to create interactive elements on web pages. JavaScript is a versatile programming language that enables developers to implement dynamic features that engage users, such as animations, form validations, interactive maps, and real-time updates without needing to reload the page. This interactivity is essential for enhancing user experience, making websites feel more responsive and engaging.

Creating static images is typically handled by HTML and CSS, and server-side scripts are more often enhanced by server-side languages like PHP or Python rather than JavaScript. While JavaScript does play a role in improving website security through techniques like form validation and preventing cross-site scripting attacks, its core function in web design revolves around adding interactivity to the front-end, making option C the most accurate representation of JavaScript's primary purpose.