The answer may be "tobacco".
Answer:
Option A
Explanation:
The population in North America is driven by the oil because all mining, drilling and oil extraction activities are carried out in North America. Due to this economic patterns there is growth in jobs that led to immigration of ethnic groups from Europe, Africa, and Asia. These ethnic groups have high fertility rate and hence their population increased rapidly. These people have immigrated to North America for the billions of dollars and millions of jobs provided by mining and oil drilling.
Hence, option A is correct
Answer:
I think Terrorism has been a challenge for the US because there have been some serious attacks that left many people dead.
They were trying to find an all - water route to Asia.
