Medium: Any material used to create art.
Proportion: A principle of design that refers to the size relationship of an art work to each other and to the whole.
Technique: The manner in which the artist controls his medium to achieve the desired effect
The answer to this is needlestick safety and prevention.
The Needlestick Safety and Prevention Act(Public Law 106 - 430) is made by Occupational Safety and Health Administration (OSHA) from US Department of Labor. It is made because many pathogens are bloodborne. The accidental sharp injuries in the medical field also are frequent and dangerous. This act will help protect the healthcare and prevent disease spread by needlestick.
Hope this helped :)
Have a great day
Selmer Eb contra-alto mouthpiece
