Choose all the answers that apply. light slows down when traveling through more dense substances does not require a medium to travel through can be absorbed and transformed into heat speeds up when traveling through less dense substances is refracted when it changes direction and speed travels in longitudinal waves

is created by vibrations in electric and magnetic fields. does not require a medium.   travels in longitudinal waves.

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.

answer seismograph;