I think it might be erosion because erosion breaks down objects
B. Means of travel. (Like how planes fly around the world.)
The best comparison between emerging global cities and struggling global cities is that the A. "Emerging global cities are growing rapidly, while struggling global cities are stagnant or declining".
<h3>What is an emerging &
struggling centers?</h3>
These are centers that are developing quickly while those struggling cities are either declining or stagnant.
Hence, the best comparison between emerging global cities and struggling global cities is that the "Emerging global cities are growing rapidly, while struggling global cities are stagnant or declining".
Therefore, A is correct.
Read more about global cities
<em>brainly.com/question/23910388</em>
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