The statement that most closely relates to the factors that partially led to the creation of democracy in ancient Greece is: The military became vital to the economics of the city-state.
In ancient Greece, particularly in the city-state of Athens, the shift in military organization played a significant role in the development of democratic principles. As the hoplite warfare emerged, where citizen-soldiers fought in phalanx formations, there was a greater emphasis on the contributions of ordinary citizens, who were typically landowners or small farmers. This change led to increased demands for political representation and rights among those who served in the military, paving the way for democratic reforms in the political structure of the city-state.
While it's important to note that not all women and men had the right to participate in politics initially, and democracy evolved over time with various reforms, the connection between military service and civic rights was a crucial factor in this historical development.