Biodiversity matters simply because without it we would not exist. However, this naturally balanced web of interdependence has suffered a lot due to an explosion in human population and a spike in the demand for natural resources.
The world we see today has come into existence through a journey of evolution for millions of years, leaving biodiversity as its trail. Biodiversity represents the variety of life on earth and the various forms of their associations. We are completely dependant upon this network of life, which we are an integral part of.