Keiko’s science teacher gave the class an assignment which requires them to present the best evidence that Earth has changed over its long geologic history. Which example should Keiko choose?

Write a 150-word essay describing the effect of people's activities on the environment in the region.

How would i answer this for an exam?

What is the difference between the cultures of central asia and the caucasus region? the majority of people in central asia are muslim; the majority in the caucasus region are christian. the primary language in central asia is armenian; the primary language in the caucasus region is russian. central asia has been plagued by ethnic unrest; the caucasus region has had little ethnic conflict. the effects of soviet rule can still be seen in central asia; the caucasus region has developed its own identity since the fall of the ussr.