[Solved] Programmers often build trapdoors into programs during system development. Hand Antiseptics: Substances used to eliminate or reduce harmful microorganisms from the hands, enhancing hygiene and preventing disease transmission. Microorganism: A microscopic living body not perceivable by the naked eye. Microscopic: Extremely small and detailed, visible only with the aid of a microscope. Living Body: An organism's bodily form that is alive, encompassing all biological functions such as metabolism, growth, and response to stimuli.