Answer:
I think it's a because it goes thru it and reflects
When minerals are exposed to high pressure and temperatures, the individual minerals begin to realign themselves
As per above given data
initial velocity = 19.3 km/s
final velocity = - 18.8 km/s
now in order to find the change in velocity




Part b)
Now we need to find acceleration
acceleration is given by formula

given that


now the acceleration is given as


so above is the acceleration
C is the correct answer, as the equation for photosynthesis is carbon dioxide +water=glucose(sugar) + oxygen