Hi dear
How are you? I hope you are fine by the grace of Allah Almighty and I'm fine too Alhamdulillah. It is 100 % right that the electricity has made our life easier and now it would be difficult and challenging to live without electricity. We can communicate with one another through internet like video calls , voice calls and text messages but in the absence of electricity we would adopt different traditional methods to communicate such as letter writing. To preserve food if there will be no electricity we would adopt traditional methods such as canning and drying. Best of luck for contest. Wishing you success.
Regards
@jannat12