I think it is C , idk why, but I just learn about this and I think it is.... sorry I didn't really help.....
An insulator is an object that prevents the flow of electricity. Examples of such are rubber, plastic, wood, ceramic.
Generator bc. It makes light
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<em>The balloon will attach to the wall because the balloon's negative charges will drive the electrons in the wall to shift to the other side of their atoms, leaving the wall's surface positively charged.</em>