The order of increasing polarity in HCl, ${\mathrm{CO}}_2,{\mathrm{H}}_2\mathrm{O}\mathrm{and}\mathrm{HF}$ molecules is

The geometry of $C{O}_2$ molecule is linear so the dipole moment of two C-O bonds cancel each other because of opposite directions and $C{O}_2,$ becomes non polar. In other molecules order of electronegativity of Cl, O and F is Cl < O < F. So polarity order is $\mathrm{H}-\mathrm{F}>\mathrm{H}-\mathrm{O}>\mathrm{H}-\mathrm{Cl}\mathrm{bonds}.$