Please answer! : 15 Points! Will give brainliest!
What were the main causes of WW1?

1. Mutual Defense Alliances

2. Imperialism

3. Militarism  

4. Nationalism  

5. Immediate Cause: Assassination of

Archduke Franz Ferdinand

Explanation:

The assassination of Austrian Archduke Franz Ferdinand (June 28, 1914) was the main catalyst for the start of

the Great War (World War I). After the assassination, the following series of events took place:

 July 28 - Austria declared war on Serbia.

 August 1 – As Austria’s ally, Germany declares war on Russia, an ally of Serbia

 August 3 – Germany declares war on France, an ally of Russia and immediately begins an invasion of

neutral Belgium

 August 4 – Great Britain, an ally of France, declares war against Germany

 The United States (President Wilson) declares that the United States will remain neutral

i would think it's industries and hydroelectric power

an expansion is one of two basic business cycle phases; the other is contraction. the transition from expansion to contraction is a peak, and the changeover from contraction to expansion is a trough.