A
LUCKY
+10 points
When many animals disappear, this damages the natural balance of ___________.
A. Climate change B. ecosystem
C. Global warming D. extinction
B. ecosystem
1. Global warming can cause ______________ events such as floods or heatwaves.
A. extreme weather B. different weather
C. adverse weather D. normal weather
A. extreme weather
LUCKY
+ 20 points
One of the main causes of air pollution is ___________ produced by machines and factories.
A. trash B. gases
C. waste gases D. dirty air
C. waste gases
2. The natural ___________ of many animals can be destroyed in the process of cutting down forests.
A. environment B. habits
C. life D. habitats
D. habitats