Which of the following represents light intensity physical activity?

Light intensity physical activity encompasses movements that encourage an increase in heart rate and breathing but do not cause significant exertion. Stretching exercises are a prime example of light intensity activity, as they typically involve gentle movements that enhance flexibility and range of motion without dramatically elevating heart rate or requiring considerable energy expenditure.

While activities such as climbing stairs and walking at a brisk pace can be beneficial, they usually fall under moderate intensity, as they demand more effort and raise the heart rate considerably compared to stretching. Running is classified as vigorous intensity due to its high energy demands. Therefore, stretching exercises stand out as the correct representation of light intensity activity, highlighting a low-impact approach to maintaining physical health and mobility.