While climbing up a steep hill, the hearing is affected because, as the altitude changes, the air pressure outside one’s body

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Remains the same

Changes

Blood pressure

none of the above

answer is B.

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Detailed Solution

While climbing up a steep hill, the hearing is affected because as the altitude changes, the air pressure outside one’s body changes.
We know that the atmospheric pressure is great at lower altitudes, with greater density. But, conversely, the density being thin, the atmospheric pressure decreases at higher altitudes.
The air pressure outside of one’s body changes as there is a change in altitude. This change in altitude creates a difference in pressure on the two sides of the eardrum. One may feel the pressure, and as a result, there is some blockage in the ears.

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