Answer:
1) electric potential, Radiant Energy(Lightening) , or sound Energy(Thundering)
Step-by-step explanation:
During lightening we know that clouds are at high electric potential and earth surface is taken at low potential.
Due to this potential difference the charge particles in the atmosphere has tendency to move from high potential to low potential.
Also the moisture present and few dipole gases present in the atmosphere will have tendency to show breakdown and due to this breakdown and motion of charge the phenomenon of lightening occurs.
So here the electric potential energy of charge particles will change and it will convert into sound energy as it produce sound as well as in Radiant energy in form of lightening occurs in the sky.