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Question


Humus is a major factor in deciding the soil structure.


Options:
A .   True
B .   False
C .   If ozone hole appears in tropical and temperate regions, it could cause a series of health problems.
D .   Ozone hole occurence is a seasonal phenomenon.
Answer: Option A
:
A
Humus is a major factor in deciding the soil structure because it causes the soil to become more porous and allows water and air to penetrate deep underground.

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