What cosmetic trend involved shaving eyebrows and hairlines in order to appear more intelligent?

The correct answer highlights a significant beauty and cosmetic practice from the Renaissance Era, transcending mere aesthetics to encompass societal perceptions of intelligence and status. During this time, it was common for individuals, especially women, to shave their eyebrows and hairlines. This practice was believed to enhance the appearance of the forehead, which was associated with intelligence and nobility. This notion reflected the values of the era, where a high forehead was often seen as a sign of beauty and intellect.

Contextually, the other periods listed did have their own unique beauty trends, but they did not specifically emphasize the removal of eyebrows and hairlines as a means to promote the image of intelligence. The Age of Extravagance was marked by lavish displays and excess in fashion, while the Victorian Age had a focus on modesty and propriety, which did not align with the beauty practices emphasizing a high forehead. The 20th Century saw a variety of trends, including the natural look, which deviated from this practice.