Which factors affect the human comfort zone?

The human comfort zone is primarily influenced by physiological and environmental factors that directly affect how individuals perceive their surroundings. Temperature, relative humidity, air movement, and radiation of heat all play critical roles in establishing comfort in a space.

Temperature is vital because it determines how warm or cool an environment feels. Relative humidity affects how moisture in the air enhances or diminishes warmth, influencing thermal comfort. Air movement can either cool a person by carrying away heat or make them feel chilly depending on the air conditions. Lastly, radiation of heat from surfaces and objects impacts how warmth is felt in a space, and these factors collectively contribute to an individual's comfort level.

While color theory and design balance, furniture layout and accessibility, as well as lighting and acoustic properties are important considerations in creating a pleasing and functional space, they do not directly address the physiological aspects that define human comfort. The factors in the correct choice focus specifically on the environmental conditions that significantly impact a person’s physical sensation and comfort.