If the soil is of high density, organisms have burrowing limbs (moles), can change the thickness of the body (earthworms).
If the soil is lumpy, the organisms have a strong cover and flexible body, such as ants.
The absence of light creates a reduction in the organs of vision, for example, mole rats.
To protect against gases and various solutions, organisms are armed with a dense, impenetrable shell, for example, in soil insects.
When there is a lack of oxygen in the soil, organisms have respiration, for example, larvae.
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