Question

which measure can best help individuals lessen their chances of acquiring a disease?
resting throughout the day
washing their hands regularly
eating three meals a day
washing their clothes in cold water

Explanation:

Washing hands regularly removes germs and pathogens that can cause diseases. Resting all day may lead to poor health (e.g., muscle atrophy). Eating three meals is about nutrition but not directly disease - prevention. Cold - water clothes washing may not kill all germs effectively.

Answer:

washing their hands regularly