1.cures,electricity,internet and vehicles
2.Yes, on electricity for example a lot of people say that Benjamin Franklin was the founding fathers of electricity,for vehicles there are lot because technology advances really fast in automobiles,so every change is an invention.
3.Cures help us heal sick people,electricity helps us with alot of things like artificial lightsources,charging modern devices and so on,internet let's us communicate with people from far or close distances, it helps us learn,and have fun,and vehicles help us get faster to any destination,either land,sea or air.
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