Answer:
D) Biodiversity (many different species of organisms)
Step-by-step explanation:
The ability to maintain the ecosystem and the surrounding nature is called sustainability. It is very important to for the sustainable development of the planet.
Biodiversity is the main contribution towards the sustainability of the ecosystem or maintaining a balance in the ecosystem. Biodiversity boosts the productivity of the ecosystem where each and every species, no matter however small they are, plays an important role in the ecosystem.