What was the short term cause that sparked world war 1

What happened after tunstall was murdered? how did billy the kid react to theviolence?

Before world war 1 started, austria-hungry was wary of (spain or serbia) because of border disputes

If the ussrs economy has remained agricultural-based rather than industrial, then a. the unemployment rate among men would have been much lower b. women would have been less in demand in the workforce c. crop productivity would have led to larger , better nourished populations d. children would not have had to leave school early to work in factories