Multiple choice question XVII — task. Science CBSE, Class 7.

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எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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The mountaineers carry oxygen with them because

The amount of air available to a person is less than that available on the ground.
The pressure of air is higher than that on the ground.
The temperature of air is higher than that on the ground.
At an altitude of more than 5 km there is no air.

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