An arrow is used to show a force acting on an object. what information does the arrow give about the force

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 : )

b.transmitters send radio waves, and receivers capture radio waves.