1] Air dissolved in water cannot be removed from it.
2] Density of air decreases with increasing altitude.
3] Air is an element that surrounds the earth and makes earth hospitable for living organisms.
4] Air helps in pollination of several flowers and in the dispersal of seeds.

Choose the correct statement.

Option 2, 3 and 4 are correct. The correct term in option 3 in the above question is habitable, not hospitable.

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