4. Which of the following is the best example of increasing an object's potential energy O A rolling a bowling ball B. stretching a rubber band Oc swinging a baseball bat dronning an anno​

B. Stretching a rubber band.

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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