Fact 1: Evolution occurs in response to a change in the environment.

Fact 2: Different environments Life is a changing phenomenon.

Given the two facts above, answer the question "Evolution occurs in response to what in life?" with the following options: 
- static events
 - global warming
 - that material's properties
 - changing phenomenon
 - major threat to health
 - changing tides
 - Animal survival
 - isolated events


 

    changing phenomenon     