A Both have polution problems and B both have effective mass transit systems also D both are culturally important to their respective countries.
Check A,B,D
Answer:
D (Brazil)
Explanation:
According to the key, the country filled in with the darkest color has the highest level of carbon dioxide.
According to the question, "increased levels of carbon dioxide are the result of an industrial economy".
Brazil has the darkest fill in color and therefore is the most industrialized.
The Arabian Desert, Gobi Desert
and the Karakum Desert
Niger and Congo are two rivers after which countries are named (actually in both cases two countries each) - and those are African countries, so they must be in Africa.
Zambezi is a river in Angola and Namibia.
Tigris is a River in Mesopotamia, in Asia - so that's the correct answer!
