Which type of clay is used to alter facial features in make-up?

The correct choice is nose putty, as it is specifically designed for altering facial features in make-up applications. Nose putty is a soft, pliable material that can easily be shaped and molded to create realistic effects such as changing the shape of the nose, adding volume, or making other adjustments to the face. This specialized product is favored in theatrical and film makeup for its ability to blend seamlessly with skin tones and its ease of use during performances.

The other options do not serve the same purpose. Air-dry clay typically hardens when exposed to air, making it unsuitable for temporary alterations on the face. Modeling clay and Plasticine, while also malleable, are primarily used for artistic creation or sculpting rather than cosmetic applications and may not adhere to the skin properly or may be too heavy for comfortable wear on the face.