Based on the fossil records, what is true concerning populations of organisms that lived on
Earth?
A. Most organisms are found in the earliest rock
layers.
В.
Most organisms stayed the same over time.
C. Most organisms that lived on Earth are
extinct.

Please help me

a) the particles of the chair are strongly held together.

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.