Which coat of arms belongs to the federal state of Baden-Württemberg?

EDITORIAL LEARNING AID

Why is this answer correct?

Image 1 shows the coat of arms of Baden-Württemberg: three black lions on a golden field. The three lions stand for the former states of Baden, Württemberg and Hohenzollern. Images 2 to 4 show the coats of arms of other federal states and are therefore wrong.

Three black lions on gold: that is Baden-Württemberg.

This translation and explanation are editorial learning aids. The official German wording and answer key govern the examination.