Final answer:
Expressionism is the style that emerged simultaneously in Germany, France, and the Netherlands in 1918.
Step-by-step explanation:
The style that emerged simultaneously in Germany, France, and the Netherlands in 1918 is Expressionism.
Expressionism was an avant-garde style that developed before World War I and remained popular during the Weimar Republic. It was represented in various forms of art, including painting, literature, theatre, dance, film, architecture, and music.
This artistic movement rejected traditional order and objectivity, emphasizing intense emotions and subjective experiences. Expressionist artists sought to convey their inner feelings and thoughts through their work, often using distorted forms, vivid colors, and exaggerated imagery.