Think of what the water is doing at different stages at a dam. The water stored behind a dam is an example of energy. As the water flows through the dam, it turns a turbine of a generator, and so the kinetic energy is converted to energy.

Julia would be observing a. static electricity was caused by her sweater rubbing against her shirt and transferring electrons. she didn't touch anything metal, so that would cancel out b.she most likely didn't rub her sweater against her hair either, so that cancels out c.she also didn't scoot across the carpet while trying to take her sweater off, that cancels out d.so that leaves a.a. is correct.