Why was nationalism so compelling to people in Europe?

In the 19th Century, Nationalism played a very significant part in the progress of Europe. Because of common national-identity, various small states were united and transformed into a Country, such as Germany and Italy. Progress and Development of the concept of the modern nation-state became easier by French Revolution. Nationalism seeks to preserve and foster a nation's traditional cultures and cultural revivals have been associated with nationalist movements. It also encourages pride in national achievements and is closely linked to patriotism.

a sample of water is taken and kept in a beaker in a freezer at a constant temperature of 0°c. if the system is at dynamic equilibrium, which of these statements is true?