6. Which of the following best illustrates the concept of total war in World War I?

A. Artillery shells caused high casualty rates along the Western Front.
B. Propaganda campaigns encouraged people to grow their own food.
C. Millions of young men volunteered to serve when war was declared.
D. The alliance system drew almost every major European power into the war.

A. Artillery shells caused high casualty rates along the Western Front best illustrates the concept of total war in World War I. Total war means all aspects of society are mobilized for the war effort, including civilians and non-combatants. The Western Front of World War I was characterized by brutal trench warfare and the extensive use of artillery, resulting in devastating casualties on both sides. The impact of total war was felt not only by soldiers, but also by civilians who were affected by food shortages, economic disruption, and propaganda campaigns aimed at boosting the war effort.