When drawing the Lewis structure for a molecule, after drawing the skeletal structure and distributing all of the electrons around the the terminal atoms, what actions should be taken if the central atom does not have a complete octet

Rearrange lone pairs of electrons from the outer atom(s) to form double or triple bonds to the central atom.

Explanation:

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.