Answer:
Electrical Energy
Explanation:
There are a variety of chemical and mechanical devices that are called batteries, although they operate on different physical principles. A battery for the purposes of this explanation will be a device that can store energy in a chemical form and convert that stored chemical energy into electrical energy when needed.
Hydrogen i think. the orbital of hydrogen is peculiar
I know number one is D for sure but number two doesn't explain enough or perhaps I don't quite understand it