A difficulty in presenting evidence for a sixth mass extinction is
A)that tropical rain forests harbor many unknown species.
B)that species numbers are declining because of habitat loss.
C)introduction of new species.
D)increased global temperatures.

Question

Quizplus · Accepted Answer

The difficulty in presenting evidence for a sixth mass extinction includes the fact that tropical rain forests harbor many unknown species, making it challenging to accurately assess the full extent of species loss.

A Difficulty in Presenting Evidence for a Sixth Mass Extinction