Question

how was denmark affected by treaty of Versailles

Answer 1

The treaty of Versailles brought harsh and humiliating peace for the Germans.
Germany lost its overseas colonies, a tenth of its population, 13 percent of its territories, 75 percent of its iron, and 26 percent of its coal to France, Poland, Denmark, and Lithuania. Therefore Denmark lost its 26% of coal resources from the Germans.

Answer 2

Denmark at that time was the colonial market of Germany but after the treaty of Versailles it was divided among the Allies of Britain and France