Answer:
1. Primary or P waves are push and pull waves
2. Secondary, S or Shear Waves are also called transverse wave
3. L or surface waves reach the earth's surface after P and S waves
I believe the answer is B: UV
It is a supernova that is thought to be a result of a explosion of a carbon-oxygen white dwarf in a binary system.
100/2.5 is 40.
40 is the energy that is being produced