Answer:
D. Different parts of the molecule have slightly different charges
Explanation:
Water is a polar molecule because different areas of the molecule have different and opposite charges
Oxygen has a higher electronegativity than hydrogen, which means the electrons of the water molecule will stay closer to the oxygen than the hydrogen.
This creates an uneven distribution where the oxygen has a partial negative charge and the hydrogen has a partial positive charge.
So, D is the correct answer.