[ Erik is yet to get accustomed to this place, to all the differences from his own world, and to all the people he's going to meet here. It's not just the natives, but the other Summoned too, particularly those who come from wildly different realities.

Her question about electricity is just another reminder of those differences. His eyebrows raise when she casts a glance his way, and since there doesn't seem to be anyone else around, he'll try to be helpful. Better introduction than talking about the weather, at least. ]

That's a complex concept that would require some previous scientific knowledge. [ Probably more knowledge than he has, too. ] Electricity is a form of energy that exists in nature, but in this instance, what that pamphlet is talking about is the harnessing of said energy to power various devices. Lighting, heating, kitchen appliances, and so on.