During the formation of metamorphic rocks, what leads to increased heat? Check all that apply.
Sun warms rocks
Magma pockets rise.
Friction occurs between sliding rocks.
Lava at Earth's surface flows over rocks.
Rocks beneath Earth's surface are forced toward the mantle.

the answer is minerals.

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.