People needs to do physical activity to maintain the good physical and mental health,to boost the immunity,to be strong etc.
Individuals need to adjust their physical activity as reduced flexibility,decreased energy levels and a loss of balance as they age.
Physical activity refers to all the movements including leisure activity,for transport to get from places,or as apart of a daily activities.Both moderate and vigorous intensity physical activity to improves health.
Therefore,the correct option is D all the 3 needs to adjust their physical activity to account as they age.
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