Biodiversity is valuble as partly because

It enhances the productivity of ecosystem.

Explanation:

The biodiversity involves variety and variability of plant and animal life.

The biodiversity enhance the productivity of ecosystem as every species play a important role regardless of their size. As a great variety of crops can be obtained from a large number of species of plants. The natural sustainability increases with the increase in species diversity. The biodiversity also useful in medicine as well as agriculture. Thus, biodiversity is valuable as partly because it enhance the productivity of ecosystem.