Laterisation is a form of chemical weathering that involves oxidation, carbonation and leaching. This natural process results in the formation of Laterite soils.

Correct Option: B

Laterisation is a form of chemical weathering that involves oxidation, carbonation and leaching. This natural process results in the formation of Laterite soils.

Afforestation is the establishment of a forest or stand of trees in an area where there was no forest. As plant roots hold the soil, Afforestation prevents soil erosion and enables better retention of water.

Correct Option: D

Afforestation is the establishment of a forest or stand of trees in an area where there was no forest. As plant roots hold the soil, Afforestation prevents soil erosion and enables better retention of water.

Red Soil is also known as yellow soil. Red soils are formed as a result of the draining down of old crystalline rock, less clayey and sandier in nature. Red clay soil are used for the production of bricks.

Correct Option: D

Red Soil is also known as yellow soil. Red soils are formed as a result of the draining down of old crystalline rock, less clayey and sandier in nature. Red clay soil are used for the production of bricks.

The organic matter present in soil is known collectively as humus. Humus is fully decomposed and finely divided organic matter. Dune is a hill or ridge of sand accumulated and sorted by wind action.

Correct Option: C

The organic matter present in soil is known collectively as humus. Humus is fully decomposed and finely divided organic matter. Dune is a hill or ridge of sand accumulated and sorted by wind action.

(ii), (iii) and (iv)

Correct Option: B

(ii), (iii) and (iv)