Refer to the Chart Below Showing the Major Threats for Plants

Multiple Choice

Refer to the chart below showing the major threats for plants, mammals, and birds that are considered vulnerable to extinction.

-What is the biggest threat, and why?

A) Intrinsic factors, because they have a big impact on threatened mammals
B) Direct loss/exploitation, because it affects both mammals and birds
C) Alien invasive species, because they have a big impact on threatened birds
D) Habitat loss/degradation, because it has the most impact on all three groups
E) Natural disasters, since they are the most unpredictable