What did european nations increasingly form alliances in the early 1900s? 1)to promote travel
2)to provide a balance of power
3)to ensure open borders
4)to make it easy to found colonies

The European nations increasingly formed alliances in the early 1900s to provide a balance of power. The correct option among all the options that are given in the question is the second option or option "2". I hope that this is the answer that you were looking for and it has come to your help.