The best explanation that describes the intramolecular bonds that exist between oxygen and each hydrogen atom in a water molecule is:
Oxygen and hydrogen share a pair of electrons and since oxygen possesses them more, the bond is polar covalent. There are partial negative and positive poles on a water molecule.
In a water molecule (H2O), oxygen is more electronegative than hydrogen, meaning it attracts the shared electrons more strongly. This results in a polar covalent bond, where the oxygen atom carries a partial negative charge and the hydrogen atoms carry partial positive charges, creating dipoles in the molecule.