Which option serves as an example of a filter in graphics editing programs?

Filters in graphics editing programs are effects applied to images to enhance or alter their appearance. The dry brush effect is a specific type of filter that simulates the look of a painting created with dry brush techniques, giving images an artistic quality by creating varying textures and brush strokes. This allows the user to creatively manipulate the image, adding depth and character, which is a core purpose of filters in digital editing.

In contrast, gradient fill primarily serves as a way to create color transitions in a shape or background, not altering photo elements directly, and crop refers to modifying the dimensions of an image by removing sections, which doesn't involve applying an effect. Texturizer, while it does apply texture, is generally considered a specific type of filter related to texture effects. However, dry brush stands out as a distinct and traditional filter option that embodies the alterations typically sought through filtering in graphics editing.