what is the correct term for the applied science that promotes the safety and well-being of a person by adapting the environment and using techniques to prevent injury?

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one time i was looking at my neighbors screen door to see if the door was open i was squinting like a fool for 10 minutes before realizing he was starring back i then died from embarrassment and am now typing this from the ghost world

c. flammable gases, patient lying in standing water, combustible liquids near the victim