What four characteristics of human are totally unaffected by the environment?

Four characteristics of humans that are generally considered to be unaffected by the environment include genetic traits, innate reflexes, basic physiological functions, and certain fundamental cognitive abilities. Genetic traits, such as eye color and blood type, are determined by DNA and remain constant regardless of environmental factors. Innate reflexes, like the knee-jerk response, occur automatically without environmental influence. Basic physiological functions, such as heart rate and breathing, are regulated by the body’s biological systems and are not directly altered by external conditions.