Diversity is a fundamental characteristic of life itself.
Biological diversity or biodiversity is an expression used to describe the richness or variety of living organisms found in an area or type of environment, including both the number and frequency of genes, species and ecosystems.
Biodiversity is usually divided into three fundamental categories:
- genetic diversity; the genetic variation within each species
- diversity of species: the different species in a given area or habitat
- diversity of ecosystems. The natural environment comprises many different types of habitats.