A principal of design that i see in the image is unity because the room represents the ocean and there are fish surrounding which brings everything together and balances out the message the author is trying to get across. hope that helps :)
A. Shapes can be either geometric or organic
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 :)
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