Why did the united states decide to enter world war 1?

Although a number of things brought about world war one there was one even that push to europe over the edge. what was that event?

How did the northern u. s. change during the 19th century? select the best choice from the answers provided. a. it became more industrial. b. it became more agrarian. c. it became less populated. d. it became less diverse

What was new about the writing system developed by the phoenicians, and why was this important to the growth of knowledge and spread of ideas?