A long thin face would be wider and fuller by applying a lighter foundation to the area of the?

The concept behind makeup application for enhancing or altering facial shapes revolves around the use of light and shadow to create the illusion of dimension. In the case of a long thin face, applying a lighter foundation to the jawline helps to create a sense of width and fullness. By highlighting the jawline, you draw attention to this area, effectively making the lower part of the face appear broader.

The jawline is often a less emphasized area in long, thin faces, and highlighting it counteracts the lengthening effect of a narrow face. This technique balances the proportions of the face, giving it a more harmonious appearance.

While other facial areas, such as the forehead or cheekbones, can also be highlighted, the jawline specifically addresses the need for added width at the lower portion of the face, which is key for someone with a long, thin facial structure. Highlighting the cheeks could enhance their prominence rather than add fullness, while applying light to the forehead could potentially elongate the face further, which is not the desired effect in this scenario. Highlighting the nose typically narrows its appearance, which is also contrary to the goal of creating more width.