Well the other guys answer is technically right their a few more details to it. The league of nations was also another attempt to stop further wars between various groups in the world. They didn't want another Holocaust or world war to happen so it made it that all nations would turn on one nation or nations if they did go rogue and attack.
Answer:
The cause of World War I, which made the aforementioned items transferred to alliances, imperialism, militarism, nationalism was the assassination of Archduke Franz Ferdinand of Austria-Hungary. When Russia began to prepare for WW1 due to the alliance with Serbia, Germany declared war on Russia.
Answer:
The olmec heads are stone represntions of a human head. These monuments are made up of large basalt boulders
Explanation:
They barely survive because they did not expect the summer to be so hot and did not expect the winter to be so cold
