The individual components of a
a)can be separated using physical means
b)are chemically combined
c)react to form compounds
d)require chemical means to be separated

Its been awhile since I've dabbled in chemistry, but i do know that A isnt the answer because the question says solution, not mixture. This looks somewhat like a trick question, it says individual components, so the answer would be C. This is because the individual components do react to form a compound. B and D would be true if it didnt say individual components, so the question is basically focusing on only one ingredient, not the whole solution. C

Radioactive fallout is a result of the fission creation used to ignite the thermonuclear fusion reaction.

Ibelieve the answer is weathering,hope my answer has you : )