1 The diagram shows an unbalanced rod. Two loads X and Y can be moved 2 points along the rod. The rod turns in a clockwise direction as shown. Which
action could make the rod balance? *
rod
х
у
movement
of rod
movement
of rod
pivot
moving X to the left
moving X to the right
moving Y to the right
moving the pivot to the left

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 : )

a coal burning power plant

an electric circuit