Q.'Stability of a community depends upon its species diversity' - Justify the statement.

Step 1. The chapter states directly, under biodiversity's importance, that 'the varieties and richness of species contribute to ecological stability and survival of species' — explicitly linking species richness to a community's ecological stability.

Step 2. The mechanism becomes clear from the chapter's own food-web warning: 'Even reduction in one species can adversely affect the entire food chain which further leads to an overall reduction in biodiversity' — in a species-poor community, losing even one species removes a disproportionately large share of the community's total ecological function, since fewer species are available to take over that lost role.

Step 3. In a species-rich community, by contrast, multiple species often perform overlapping ecological functions (similar feeding roles, similar pollination or decomposition functions), so the loss of any single species is more likely to be compensated by others still present — this functional redundancy is what lets a diverse community absorb shocks like disease outbreaks, temporary resource shortages or a moderate pollution event without its overall structure collapsing. …

Justify the stability-diversity link using the chapter's explicit 'species richness contributes to ecological stability' statement and its food-we …

• Asserting the stability-diversity link without explaining the underlying mechanism (functional redundancy / overlapping ecological roles). …