Which HTML5 API is used for rendering visual images dynamically?

The HTML5 API used for rendering visual images dynamically is the Canvas element. The Canvas API provides a flexible way to draw graphics on a web page directly through JavaScript. This allows developers to create and manipulate images, shapes, and animations in real-time.

Canvas operates as a bitmap, meaning it allows for pixel-level control of the image rendering process. With it, developers can draw shapes, text, images, and even animations by utilizing various methods provided by the context of the canvas, such as drawing lines, filling shapes, and manipulating colors. This dynamic rendering capability is essential for creating interactive graphics, games, and data visualizations within web applications.

In contrast, the other options focus on different functions: XMLHttpRequest is primarily for making HTTP requests and handling data exchange between client and server; Application Cache, while designed for enabling offline experiences, does not deal directly with rendering images; and Dynamic HTML refers generally to the combination of HTML, CSS, and JavaScript to create interactive web content but does not specify an API designed for drawing graphics. Thus, the Canvas API stands out as the specialized solution for dynamic image rendering in HTML5.