I think c cause if he is in a relationship that’s abusive he needs to speak up before it goes way worst.
C) Has sub levels within the energy levels. Lol forgot to put C
I think the answer is white sand (sorry if i am wrong)
Answer:
Copper turns green on exposure to air
Explanation:
Liquid water freezes to form ice: Physical change
Reason: Water can melt back when it becomes ice.
Copper turns green on exposure to air: Chemical change
Reason: The copper can not change back from the green state when it turns green.