Which of the following is most likely to have a much higher breathing rate?(a) man (b) fish (c) dog (d) sparrow

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(b) Fish

Fish use the dissolved oxygen in the water to breathe, which is in a minimum quantity. So for the better respiration in the minimum quantity of oxygen, fish has a special organ known as gills, which provides a large surface area for the exchange of gases, because of which their rate of breathing becomes higher than other organisms.