Answer: The movement of electrons due to kinetic energy
Explanation: best one i could see not 100% tho
Answer: The correct answer is A.
Explanation: Reason being is that if you look it up it'll explain that it is the movement of electrons being removed or added.
Also, I know this is truly correct because I've taken the test myself.
Please ignore the other persons answer because they are incorrect.
I hope this helps!! :D