Arrange the following activities in the order of increasing breathing rates and give reason for your answer.
(i) Sleeping
(ii) Watching T.V.
(iii) Brisk walk
(iv) Cycling
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Solution
Cycling > Brisk walk > Watching T.V. > Sleeping
Whenever a person does an activity, the breathing rate becomes faster. It further increases with strenuous work to provide more oxygen to the cells to get more energy.