Hi there, sorry for the late answer!
First of all, lets review what "Unification" is.
Unification is the process of joining parts together into a whole; in national unification, diverse regions are brought together as one nation.
The factors that helped the unification in Italy were..
Geography (Italy is isolated. The alps are to the north, and they are surrounded by oceans), History(Italians are very proud of their heritage, including the Italian Renaissance), and the Efforts of 3 men (Mazzini, Garibaldi, Cavour).
Factors that encouraged German Unification were because they could not persuade parliament, they were aligned with Austria to attack Denmark for Schleswig and Holstein, and had a quick victory increasing Prussian nationalism.
On Thursday, October 24, 1929, less than eight months into Herbert Hoover’s presidency. Most experts, including Hoover, thought the crash was part of a passing recession. By July 1931, when the President wrote this letter to a friend, Governor Louis Emmerson of Illinois, it had become clear that excessive speculation and a worldwide economic slowdown had plunged America into the midst of a Great Depression. While Hoover wrote to Emmerson that "considerable continuance of destitution over the winter" and perhaps longer was unavoidable, he was trying to "get machinery of the country into action.
1.hostile Indians
2.starvation
3.poor leadership and government
According to sources, it codified the laws of France. "The Napoleonic Code unified the laws of France into a single code of law. It granted equal rights to members of all social groups and established separation of religion and secular law. The Napoleonic Code has influenced civil law in most of Europe, Canada, Latin America and the U.S. state of Louisiana."
