How is biodiversity is of direct economic value, and give an example

Biodiversity can be an economic value for ecosystems where there are certain species of fish or game that are hunted that only survive because of the biodiversity of the area. In addition in the business of eco-tourism regions that are rich in biodiversity are areas that are highly visited and sought after because of the preservation of the natural habitat. 

True statement gravity force is more on bigger mass, less on smaller mass.all mass fall on planet with same acceleration and speeds