15 The diagram shows the electrolysis of aqueous sodium bromide and molten sodium
bromide.
Copper wire
Aqueous
sodium
bromide
Molten sodium
bromide
graphite
electrodes
Which substance in the diagram has both positive ions and mobile electrons?
A
Aqueous Sodium bromide
B Copper Wire
СGraphite electrodes
D Molten sodium bromide​

i think it's letter a.

you need to stop taking that class

if the temperature drops and becomes cool

then the atmosphere can be freezing as the water vapor in the air is at maximum (100%) and can be severely cold

also can be snowing lightly as the moisture in the air will start to solidify

and btw this is not chemistry but