What is biodiversity and how is it defined?

Biodiversity refers to the variety and variability of living organisms present on Earth, including plants, animals, microorganisms, and the ecosystems they form. It encompasses diversity at different levels such as genetic diversity within species, species diversity within a region, and ecosystem diversity across geographical areas. In scientific terms, biodiversity is defined as the total number of genes, species, and ecosystems in a given region, reflecting the complexity of life and its interactions. It plays a crucial role in maintaining ecological balance, supporting ecosystem services, and ensuring the sustainability of natural resources.