Final answer:
Tzar Nicholas II abdicated the Russian throne due to mutiny of his troops, social and economic discontent, and the strain of World War I.
Step-by-step explanation:
Tzar Nicholas II abdicated the Russian throne due to several factors. One major factor was the mutiny of his troops in the capital, which resulted in a loss of support and control. Additionally, the social and economic discontent among the Russian people, coupled with the strain of World War I, created an unstable environment that led to mass protests and unrest. The abdication of the Tzar ultimately paved the way for the Russian Revolution and the rise of the Bolsheviks under the leadership of Lenin.
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