A toaster uses electricity to toast bread. The diagram shows the inside of a toaster. Which statement best explains the way a toaster uses electricity to toast bread?
A. Electrical energy is changed into light energy and motion energy.
B. Heat flows through the electric current and changes into light in the wires.
C. Electric current changes into motion energy that turns on the heating element. D. A toaster uses heat energy that is converted from electric current.

the role of the microscope world in creating new materials .

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation:

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

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