How is biodiversity important for ecosystem functioning?

Hint: Biodiversity is the variability of life on Earth and it’s typically a measure of variation at genetic species, and ecosystem both, biodiversity generally tends to cluster in hotspot areas and it increases through time, but as time goes, some rapid changes may occur in the environment which typically may result in mass extinction.

Complete answer:
Biodiversity is a variation among all living organisms from different sources and the biosystem includes terrestrial, marine, desert, and ecological complex.
It mainly describes the richness and variations of life and it is a very important feature of our planet, where without biodiversity there is no life.
This term was coined in 1985 and it is important for natural as well as artificial ecosystems, and this biodiversity deals with nature's variety that is the biosphere.
This biodiversity also includes the number of different organisms and their frequencies in the ecosystem.
This is the one that reflects the organization of organisms at a different level.
Biodiversity has both ecological and economical importance because this biodiversity provides us nourishment that is required like housing and this provides fuel, clothing and so many other resources.
Some of the ecosystem services such as protection of water resources and nutrition and storage cycle.
When coming to some of the biological resources that one obtained from biodiversity is food, medicines, and other benefits.
Research and recreation of tourism and culture values this all are of the social benefits of biodiversity.

Note: Rich biodiversity means which provides a higher number of species so the lower the rate of extinction, while if the biodiversity is low, then an increase in the extinction of even one or two species has a negative impact on the entire ecosystem so that biodiversity ensure the stability and proper functioning of an entire ecosystem.