How did alliances between nations serve to escalate World War 1? Nations that shared a common culture were expected to fight on behalf of their neighbors.
Nations were forced to declare war against other nations because of pacts they had signed.
Nations at war targeted neighboring nations of the enemy as an offensive strategy
Nations that were on good terms with a nation at war were automatically considered enemies​

Answer

Nations at war targeted neighboring nations of the enemy as an offensive strategy

Explanation:

The alliances were made so you had support if a war broke out. Germany during World War I was known for its offensive strategy due to a strong nationalism. They also had imperialist ideas about creating a great Germany. The other nations was forced to declare war on Germany as they made a pact with Austria-Hungary. When Germany made that pact and helped Austria-Hungary, the other alliances was forced to fight Germany as a defensive strategy against them.

the answer i chose to believe is 'harmony'