D. Age, environment, heredity, maturation contains factors that contribute to physical fitness
Age: It is apparent that at a certain age, fitness levels decline. For instance: An athlete's reflexes can be dominant when they are younger, and their fitness level declines as they get older.
Environment: Maintaining a healthy environment is another crucial factor. A cheerful population is helped by a pleasant environment.
Heredity: There is a balanced effect of heredity on physical fitness, thus it is not required for a kid to be as fast as his/her father.
Maturity: This is a factor that should go without saying because maturity should be taken into account when taking dietary supplements, getting enough sleep, exercising, and many other things.
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