Final answer:
Dipolar orientational polarization is temperature-dependent because it involves the alignment of polar molecules, which is disrupted at higher temperatures due to increased molecular movement. This contrasts with electronic and ionic polarization, which are less affected by temperature changes.
Step-by-step explanation:
The statement implies that unlike electronic and ionic polarization, which are relatively independent of temperature, dipolar orientational polarization varies significantly with changes in temperature. This can be understood through the behavior of polar molecules under the influence of an external electric field.
Polar molecules possess a permanent dipole moment due to the uneven distribution of electrons between covalently bonded atoms with different electronegativities. These molecules can align with an external field, leading to orientation polarization. The degree of alignment, and therefore polarization, is tempered by thermal agitation; at higher temperatures, the increased movement of molecules makes it more difficult for the external field to align them, thereby reducing orientation polarization.
In contrast, electronic polarization, due to the distortion of an atom's electron cloud by an electric field, and ionic polarization, arising from the relative displacement of cations and anions in an ionic lattice, are less affected by temperature as they involve less extensive movement of electrons or ions.