Why might the ability to produce three- dimensional images of organs be helpful in
diagnosing a patient's ailment?

i guess that visual aids present persuasive examples to what you are presenting, some factors would be theme (does it fit with the color, information, what you are presenting), size (can you see it, is it a big enough span of data/information), and overall look of the visual aid.

hope this : )

answer: the answer is a

a.) travels faster in solids because the particles are closer together.

air is a gas water is a liquid

e/c, where e is its total energy