Species diversity refers to the number of various species, which are demonstrated in a given community. The effective amount of species signifies the amount of equivalent plentiful species required to attain the same mean proportional profusion of species as that witnessed in the dataset of concern.
The species diversity comprises three constituents: taxonomic or phylogenetic diversity, species richness, and species evenness.
Species richness refers to the basic count of species, species evenness signifies how equal the abundances of the species are, and taxonomic or phylogenetic diversity refers to the genetic association between distinct groups of species. Thus, the correct answer is an island with a lake, mountain, and rivers in the tropics will have the highest species diversity.