Question

how did europe change after napoleon was defeated?
the french revolution spread to other countries.
france was reduced to half its original size.
many monarchies were restored.
britain and prussia became less powerful.

Explanation:

After Napoleon's defeat, the Congress of Vienna aimed to restore the balance of power and the old - order in Europe. The French Revolution's spread was more during Napoleon's era as he carried some revolutionary ideas (like legal codes) with his conquests. France was not reduced to half its original size. Britain and Prussia actually gained more influence. The main aim of the post - Napoleonic settlement was to restore the monarchies that had been overthrown or weakened by the Napoleonic Wars.

Answer:

Many monarchies were restored.