Answer:
option A is the most supported hypothesis by astronomers
Atomic mass is the sum of the masses of the protons, neutrons, and electrons in an atom
A mole is a unit used to convert between the number of atoms and grams in an element. The information given on the periodic table is based on a mole or 6.02 *10^23 atoms of the element.
Well all reactions need energy to start it. The light is the energy that the reaction requires to start it. Sunlight also has no mass in the first place so laws of conservation of mass don't apply to it.
