Can somebody give me the answer to this ?

That`s tough for me to answer, but the definition is to retain, or require heat or energy to make a function of process. I would think it is fireworks, because a chemical reaction is required to produce the effects, but each answer retains heat in some way. I would still choose fireworks though. Hope that helps . . .

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.

shield volcanos are angry and get mad over the smallest things so much that there heads erupt   pahoehoe and a'a lava. a composite volcano is the poller opposite of a shield volcano. its   peaceful thing and knows how to control its emotions.