To accurately answer the question about the map's information, let's analyze each statement:
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The territories and several states in the Midwest produced no crops in 1860. - If the map shows agricultural production, this statement may not be correct as many Midwest states and territories were known for crop production during that time.
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The southern-most states relied most heavily on one crop. - This statement might be true if the map indicates that these states primarily produced a single crop like cotton.
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Louisiana held a monopoly on the sugar industry in 1860. - This could be accurate if the map specifically illustrates Louisiana's dominant position in sugar production.
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Most states in the South had at least two crops on which their economy relied. - This statement suggests diversity in crop production, which may also be true depending on the details presented on the map.
Based on typical historical contexts of the agricultural economy in 1860, if the map supports a situation where Southern states predominantly relied on a single crop, then the statement about "the southern-most states relied most heavily on one crop" would likely be the best description of the information shown on the map.
Therefore, the most accurate statement would probably be:
The southern-most states relied most heavily on one crop.