Final answer:
The Triple Entente was an alliance in World War I consisting of Great Britain, France, and Russia, which opposed the Central Powers.
Step-by-step explanation:
The Triple Entente, which was a key alliance during World War I, consisted of Great Britain, France, and Russia. This alliance was formed as a counterbalance to the Central Powers, which included Germany, Austria-Hungary, and initially Italy. The Triple Entente was a significant factor in the entangling web of alliances that predicated the war. With Great Britain's declaration of war following Germany's invasion of Belgium, this alliance solidified into the military coalition that faced the Central Powers. Over time, the Allied Powers grew to include other nations such as Italy, which switched sides in 1915, and the United States, which joined in 1917.