Why is the bond in hydrogen fluoride polar?

The bond in hydrogen fluoride (HF) is polar due to the difference in electronegativity between the hydrogen and fluorine atoms.12

Electronegativity is the power of an atom to attract shared electrons toward itself when part of a compound. Because fluorine is the most electronegative element, it exerts a much stronger pull on the shared electron pair than the hydrogen atom does.2314

As a result, the shared electrons are drawn closer to the fluorine atom, giving it a partial negative charge, while the hydrogen atom acquires a partial positive charge. This unequal distribution of electrical charge creates an electric dipole, which is the defining characteristic of a polar bond.23