What happens to an environment to cause extinction? 
relocation changes rain exposure forces wind Pollution discovery
A B C D E F G H
Extinction is a natural part or the process of evolution.
Extinction can occur in response to change in environment 
What happens to an environment to cause extinction?  (A) relocation (B) changes (C) rain (D) exposure (E) forces (F) wind (G) Pollution (H) discovery