Verbal to Non-Verbal : Read the following information and complete the tree diagram.
Soil erosion, a major environmental hazard today is caused by
both natural and man-made factors. Soil erosion is caused by
unobstructed over flow and the flow of running water which carry
away the topmost layer of the soil. Forest fires which destroy the roots
of the plants which bind the soil together and lead to erosion.
The effects of soil erosion are flood, drought etc. As the vital
nutrients of soil get wasted away, the soil turns barren. Soil erosion
can be prevented by construction of dams, bunds etc. Afforestation
helps to prevent soil erosion as tree holds the soil together with their
roots. Improved method of agriculture such as contour ploughing also
help checking soil erosion.