Which of the following is true about the simple machine shown in red

a. it shortens the distance needed to carry objects into the truck

b. it reduces the weight of objects being carried into the truck

c. it reduces the size of the force needed to carry objects into the truck

d. it reduces the amount of energy needed to carry objects into the truck

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.

sure im new too!

explanation: