What makes water a polar molecule?

Water has a partial negative (𝛿-) charge on one side and a partial positive (𝛿 +) charge on the other. These partial charges arise as water (H₂0) is composed of one atom of oxygen (O) joined to two atoms of hydrogen (H₂) by shared electrons aka covalent bonding; the shared negative hydrogen electrons are pulled towards the oxygen atom, which is more electronegative than hydrogen, so the other side of each hydrogen atom is left with a slight positive charge. The unshared negative electrons on the oxygen atom give it a slight negative charge. [Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons, and oxygen is better than hydrogen at attracting electrons, because it has more positively charged protons in its nucleus]