Why is a switch used in an electric circuit?
a. it is used to increase the power.
b. it is used to open and close the circuit.
c. it is used to decrease the magnetism.

And give a detailed description! scientist observes the boundary between two tectonic plates for a decade and finds that no new volcanoes have formed over the course of her investigation. does this result support the theory of plate tectonics? why or why not?

Has regulatory areas for thirst, hunger, body temperature, water balance, and blood pressure

In general, are there any major differences that you can see? explain