Answer :
The correct answer D.biodiversity
Biodiversity
biodiversity:
the variety of species in an ecosystem
Ecosystems are complex systems in which all species are dependent on each other. Biodiversity refers to the different species of plants and animals that are part of an ecosystem. The level of biodiversity in an ecosystem can be an important predictor of its stability.
biodiversity is also the variety of life in the world or in a particular habitat or ecosystem.