Which of the following statements best describes the use of "Rasterize" in Photoshop?

The statement that "Rasterize" changes a vector image into a bitmap image accurately reflects the function of the rasterization process in Photoshop. When an image or layer is rasterized, vector data, which is defined by paths and mathematical equations, is converted into a grid of pixels. This transformation results in a bitmap image, meaning that it consists of fixed-size pixels that make up the visual content.

This process is significant because, once a layer is rasterized, it loses its ability to be scaled without losing quality—characteristic of vector images. Rasterized layers can then be edited with pixel-based tools, allowing for detailed adjustments like painting, retouching, and applying effects that rely on a pixel-based approach.

The incorrect options refer to different aspects of image handling or editing that are not directly related to the concept of rasterization. For instance, defining shapes using curves and points pertains to vector graphics rather than rasterization and does not involve the conversion from vector to bitmap. Compressing file size without losing quality relates to image formats and compression techniques, which are independent of the rasterization process. Cloning layers involves duplicating layers or parts of layers rather than changing their fundamental data type.