I think the answer is b or f
Nutrient Leaching
Leaching is the process where dissolved nutrients in the
soil profile moves downward with percolating water. It is the loss of
water-soluble plant nutrients from the soil. The nutrients that seep through
the rooting zone may be recycled if roots grow deeper.
the importance of water is that it will make you survive and it will make you feel fresh
To be able to compare the results to a sample without any of the independent variable added.
