Guys, I need help with something for school!

But you've turned England, France, and Russia into "poor little lambs." They also pursued their own expansionist goals. I might be wrong. But I'm really curious. Tell me more.

God forbid, of course, they weren't poor little lambs. But they weren't pursuing expansionist goals. The Entente was a defensive alliance. They only entered the war when one of them was attacked (in a simplified view). England already had everything; it didn't need to conquer anything; it needed to defend what it had. France... well, there were certainly revanchist sentiments. They wanted to take revenge on the Germans for the Franco-German War of 1871 and regain Alsace and Lorraine. But at the same time, fighting Germany alone would have been tantamount to suicide for them. So, France sought closer ties with Russia so that the Germans would have to fight a war on two fronts. England also needed to stick with the French because they had common interests (preserving their colonies). Hence the expression that France became England's sword on the continent, i.e., in Europe. England was cunning and waged war through the French and Russians.
Therefore, the Entente itself represents a very interesting system of alliances. France had an agreement with Russia in case of war, and England had an agreement with France. There was no military agreement between Russia and England...

As for the Balkans, Russia wanted to control the straits. You're right. But not through a world war. Russia was not ready for that at all. And England wouldn't have allowed it, and the Russians knew that.