The term that describes the variety of different species within a particular habitat is biodiversity. Biodiversity encompasses both the number of different species and the genetic diversity within those species. High levels of biodiversity contribute to ecosystem resilience, enabling habitats to withstand disturbances and adapt to changes. It also plays a vital role in providing ecosystem services, such as pollination, nutrient cycling, and climate regulation. Thus, preserving biodiversity is crucial for maintaining ecological health and supporting human life.