Explain the issues associated with coral harvesting methods.

Harvesting coral is bad for marine life. Not only you are depriving them of their habitat but also, you are depriving them of the food they are going eat. Some marine life are dependent on the corals and by eliminating it, you are also killing them.

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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