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Contour lines determine the steepness of the land by how close they are together. Generally, contour lines rise to a particular scale (e.g. a line for every ten metres), therefore, if the contour lines are closer together then the height of that particular area has risen more steeply than if the contour lines are further apart where the steepness has increased more gradually.
Answer:The social benefits include access to forest products that households rely on for their subsistence, such as firewood, fodder for livestock and timber for housing. The main ecological benefit is higher biodiversity in the tropical forests. . Tree species richness was used as the indicator of forest biodiversity
