* Electronegativity: Carbon and iodine have relatively similar electronegativity values. The difference in electronegativity between them is not large enough to create a complete transfer of electrons, which is characteristic of ionic bonding.

* Sharing of Electrons: Instead of a transfer, carbon and iodine share electrons to form covalent bonds. Carbon forms four single covalent bonds with four iodine atoms.

* Molecular Structure: The tetrahedral shape of CI₄ also supports the covalent nature of the bonding.

In summary: While there is a slight polarity in the C-I bonds due to the electronegativity difference, the overall nature of the bond in CI₄ is covalent.