A)air pollution
B)habitat
C)climate change
D)invade species

B) habitat change.

Explanation:

The decline in biodiversity is due to hunting and the large-scale changes in the climate of the tropical regions of the world. This has led to the massive that s 52% decline in the number of vertebrate species across the globe. With their habitat loss, they are unable to survive and hence get extinct.

Determine the  wavelength of light emitted when an electron  in an li2+ ion  makes a transition from an orbital with n  =  6 to an orbital with n  = 5.