Which of the following factors contributes to South Asia's environmental challenges?
A.
pollution from motor vehicle exhaust**
B.
ash from volcanic explosions
C.
destruction from earthquakes
D.
drought from low rainfall
I think its A if not C
A is correct.
You are correct, factor A, pollution from motor vehicle exhaust, is one of the contributors to South Asia's environmental challenges. To arrive at this answer, we can examine each option individually.
Option B, ash from volcanic explosions, while it can have localized environmental impacts, is not a major factor contributing to South Asia's overall environmental challenges.
Similarly, option C, destruction from earthquakes, although it can devastate certain areas and cause environmental damage, is not a widespread or significant factor in South Asia's overall environmental challenges.
Option D, drought from low rainfall, is also a valid concern in South Asia. However, it is not mentioned in the options you provided.
Therefore, by process of elimination, the correct answer is indeed option A, pollution from motor vehicle exhaust, as it is a substantial contributor to South Asia's environmental challenges.