Which of the following statements about coral reef preservation efforts is true?
a.
in order to preserve coral reefs, all aquarium trade in coral reef organisms must end.
b.
legislation has had no impact on coral reef preservation efforts.
c.
various preservation methods have had some positive impact on coral reef preservation.
d.
education of fishermen has eliminated all coral reef loss.

organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.

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.

if it's not useful, feel free to report for mistake in answer.