Concept:Controlling pathogens means directly killing them or preventing their survival, growth, and spread.
Explanation:Ultraviolet radiation damages the genetic material of microbes, so it kills pathogens directly.
Disinfectants are chemical agents that destroy pathogens on surfaces and in water.
Destroying the habitats of pathogens, such as draining stagnant water, removes their breeding sites and stops them from multiplying.
Eating a balanced diet helps to keep the immune system strong and supports the body in resisting infections that have already entered it.
However, a balanced diet does not directly kill, remove, or reduce the number of pathogens present in the environment or in the body.
Therefore, unlike the physical and chemical methods listed above, eating a balanced diet is not an activity that directly controls pathogens themselves.
Answer:C. eating balanced diets.