Here's why:

* Carbon (C) has four valence electrons.

* Fluorine (F) has seven valence electrons.

* To form a stable molecule, carbon needs to share four electrons, and fluorine needs to share one electron each.

* This results in four single bonds between the carbon atom and four fluorine atoms.

The four fluorine atoms are arranged symmetrically around the carbon atom, forming a tetrahedron with bond angles of 109.5°.