1. determine the electronegativity between the atoms of each molecule.
co2
h2o
nh3
ch4

2. identify the bond as either ionic or covalent.
co2
h2o
nh3
ch4

3. state whether the molecule is polar or non polar.
co2
h2o
nh3
ch4

4. identify the structure as having hydrogen bonding, dipole-dipole moments or london dispersion forces (ldf).
co2
h2o
nh3
ch4

i'm assuming that it's c.) red bank..

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.