Please help me
What event gave Austria-Hungary an excuse to attack Serbia (and SPARKED WWI)?

The immediate reason for Austria's ultimatum was the assassination of Archduke Franz Ferdinand and his wife Sophie in Sarajevo, Bosnia on June 28, 1914 by the Bosnian Serb nationalist, Gavrilo Princip. that is also the reason WW1 sparked

Explanation: hope it helps!

classical republicanism, also known as civic humanism, is a form of republicanism  developed in the renaissance inspired by the governmental forms and writings of  classical  antiquity, especially such  classical  writers as aristotle, polybius, and cicero.

answer; the values, beliefs, and assumptions about appropriate behavior that members of an organization share;