Fact 1: Global warming is when worldwide temperature increases.

Fact 2: Mass extinction occurs in the ice age and global warming periods.

Given the two facts above, answer the question "When worldwide temperature increases, mass what occurs?" with the following options: 
- extinction
 - deforestation
 - carbon
 - ice age
 - living
 - movement
 - It decreases
 - Pollution


 

 extinction        