Question

Which best explains why Great Britain, France, and Russia formed the Triple Entente?

They hoped to help each other imperialize Africa and counter the power of the Triple Alliance on that continent.
They feared the rising military power of Germany and sought to counter the power of the Triple Alliance.
They wanted to prevent conflict in the Balkans and convince the Triple Alliance not to interfere in the region.
They sought to surround Germany on two sides and convince the Triple Alliance not to expand its power.

Answer 1

They feared the rising military power of Germany and sought to counter the power of the Triple Alliance.

Briefly: Britain, France, and Russia formed the Entente to balance and deter Germany (and its allies Austria-Hungary and Italy), responding to Germany’s growing military and diplomatic assertiveness.