Why does ebonite rod rubbed with fur cause a stream of water to bend?

When an ebonite rod is rubbed with fur, it becomes negatively charged due to the transfer of electrons from the fur to the ebonite. This negative charge creates an electric field around the rod. When a stream of water, which is polar, comes near the charged rod, the positive ends of the water molecules are attracted to the negatively charged rod, causing the stream to bend towards the rod. This phenomenon demonstrates the interaction between electric charges and polar molecules.