ASAP WILL GIVE BRAINLIEST
Which of the following is an example of biotechnology? Bacteria are genetically modified to produce a drug or vaccine. Doctors study how blood flows through the circulatory system. Scientists perform an acid-base reaction in a lab. A new computer system that is faster than any previous one.

a

Explanation:

bio- life vaccine - tech

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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