Not sure what you are asking if you can clarify I will answer for you.
Explanation:
the advantage is that you can get your goods transpired faster.
the disadvantage is that when the trains would pass there would be a lot of noise which would scare your animals.
I'm not entirely sure of this answer.
The main factor that led to the stock market crash of 1929 was the inflated and baseless valuation of companies in the stock market, based on unwarranted optimism.
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