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Electromagnets can easily be turned on and off.
Explanation:
An electromagnet produces magnetic field which is done by the electric current. These electromagnets contain a wire would like a coil. The current passes through the wire and the magnetic field is concentrated in the center which is the "center of the coil".
When the current is "turned off" the magnetic field "disappears". This shows that we have can have a control over the passage of current or the magnetic field. Thus, the "main advantage" of the electromagnet is that it can be easily turned on and off whenever necessary.
Answer:
C). The particles move slower until the matter changes into a liquid.
Explanation:
When heat is removed the particles condense turning it into a liquid and further cooling will turn the gas into a solid.
The vertebrate endoskeleton is internal while an arthropod's exoskeleton is not
