Why does an energy pyramid show a decrease of energy in every trophic level?
a). much of the energy from the organism consumed is lost as heat.
b). the higher the trophic level, the less energy needed for survival.
c). all of the energy is converted to the mass of the larger organism in the food chain.
d). the higher the trophic level, the more efficient the energy consumption of the organism.

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.