the mounting member depending on the way in which the speaker unit is held and the height position at which the speaker unit is held. In such a case, the human operator has to engage the fall-preventing member with the mounting member by touch, which would extremely lower the efficiency of the operation and may result in a mounting error.genetic diversity (Diversity of genes within a species), species diversity (Diversity among species), ecosystem diversity (Diversity at the level of community/ecosystem) and habitat diversity. The genetic diversity acts as a buffer for biodiversity (Verma, 2017a). Biodiversity is the very basis of human survival and economic development. It helps in maintaining the ecological balance. There is a necessity of ecological balance for widespread biodiversity (Verma 2017b). It plays an important role in the function of an ecosystem by providing many services like nutrients and water cycling, soil formation and retention, resistance against invasive species, pollination of plants, regulation of climate, as well as pest and pollution. Biodiversity is also the source of non-material benefits like spiritual and aesthetic values, knowledge system, cultural diversity and spiritual inspiration. Each and every