Analyze the role of electronegativity in the formation of polar molecules, using water as an example.

• A. Electronegativity results in equal sharing of electrons, making water non-polar.
• B. Electronegativity has no impact on the polarity of water.
• C. Electronegativity only affects ionic bonds, not covalent bonds.
• D. Electronegativity causes unequal sharing of electrons, leading to a polar molecule like water.

Answer: (D)