Answer: Option A
:
A, B, and D
The process of loosening or turning the soil is called tilling or ploughing. It is one of the basic steps followed before a crop is sown.
Advantages of the process are:
  $\bullet$ Loosened soil is more aerated and allows the roots of plants to penetrate deeper.
  $\bullet$ It aids the survival of earthworms and microorganisms which add nutrient-rich humus to the top soil.
  $\bullet$ It brings underlying nutrient rich soil to the top for plant usage.