Roshan describes the basic parts of an electric circuit using a shower as a model. which part of a circuit does the water pipe represent? the wire the switch the battery the resistor

The best answer would be the wire.

The water pipe acts like a wire in a circuit in a way that it directs the water to the shower head. The wire in a circuit conducts electricity to the appliances or connects the appliance to the power source. Water in this case would be the current and the pipe delivers it.

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c. earths continental crust is thicker than its lithosphere.

because, the lithosphere is the outermost layer of the earth/ 100 km thick and is defined by its machanical properties.the lithosphere contains oceanic and continental crust that varies in age and thickness across locations and geologic time. the lithosphere is the coolest layer of the earth in terms of temperature. the term lithosphere should not be confused with the use of "geosphere" which is used to indicate all of earth systems, including the atmosphere, hydrosphere   and biosphere. the surface of the earth can be divided into the continental crust and the oceanic crust.   the continental crust is made mostly of granite while the oceanic crust is made of basalt. the average thickness of the continental crust is 25 miles and the average thickness of the oceanic crust is 5 miles.   three types of rock, igneous, sedimentary, and metamorphic, make up the surface of the earth. that's why 3 option is preferable.