What is the function of phloem tissue in the plant transport system? A. it prepares food
B. it transports food
C. it transports water
D. it provides support

option B is the right answer it helps in transfer of food.

it's all four options.

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.