Gravity can be described as..? A. an magnetic force found in nature

B. the force that moves electrical charges

C. the force that repels object with like chargers

D. the force of attraction between two objects

D

Explanation:

Gravity is the force of attraction between two objects.

Each object creates a gravitational field in wich every other object is affected by it.

a

explanation:

because they are cartillidge

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 : )