Final answer:
Species evenness, a measure of relative species abundance, determines the diversity of species by analyzing the distribution of individuals among species in an area.
Step-by-step explanation:
Species evenness, which is a measure of relative species abundance, is used to determine diversity of species. It focuses on the distribution of individuals among species in an area. Species evenness considers the proportion of each species present in the ecosystem and provides insights into the balance and distribution of different species. This measure helps in understanding the overall health and structure of an ecosystem.