Which of the following techniques can create detailed textures like fur or grass in a painting?

The technique that effectively creates detailed textures such as fur or grass in a painting is drybrush. This method involves using a dry brush with very little paint applied to it, allowing the artist to create subtle textures and fine details. When the brush is dragged across the surface of the canvas or paper, it leaves behind uneven strokes that mimic the natural texture of materials like fur or the individual blades of grass. This technique emphasizes the surface texture and can convey a sense of light and shadow effectively.

In contrast, wash involves applying a diluted layer of paint, which would not achieve the fine details necessary for textures like fur or grass. Sgraffito refers to scratching through a layer of paint to reveal a different color beneath, which is primarily used for creating patterns rather than fine textures. Alla Prima is a painting technique where paint is applied in one layer without letting the previous layer dry, which is more associated with achieving a fresh and lively appearance rather than intricate textures. Thus, drybrush stands out as the most suitable technique for creating the specified detailed textures.