Read the given paragraph carefully and answer the following question.
Soil erosion is a naturally occurring process that affects all land forms. It refers to the wearing away of a field's topsoil by natural physical forces of water and wind. Topsoil, which is high in organic matter, fertility and soil life, majorly contributes to the growth of crops. Soil erosion reduces cropland productivity and causes the pollution of watercourses, weltlands and lakes. Which of the following options does NOT show steps taken to prevent soil erosion?

Lets check by option;

Option (a); Use of proper drainage canals. (Follows)

Proper drainage systems control water flow, preventing excessive runoff that could wash away topsoil.

Option (b); Using of contour sloughing. (Follows)

Contour plowing (or sloughing) helps slow down water runoff, reducing soil erosion on slopes.

Option (c); Soil erosion is a result of mankind's unwise actions such as overgrazing or unsuitable cultivating practices. (Does not follows)

This statement describes the cause of soil erosion rather than a preventive measure.

Option (d); Planting provides a protective cover on land, and this allows most of the rainwater to soak into the ground. (Follows)

Plants and vegetation help bind soil particles together, preventing erosion by wind and water.

So, options (c) does not show steps taken to prevent soil erosion.

Thus, the correct answer is (c).