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1.) what cash crops are important to the economy of the tropical north?

Cash crops grown in regions with a temperate climate include many cereals (wheat, rye,corn, barley, oats), oil-yielding crops (e.g. rapeseed, mustard seeds), vegetables (e.g. potatoes), tree fruit or top fruit (e.g. apples, cherries) and soft fruit (e.g. strawberries, raspberries).

Ansradar; im guessing here; good luck : )

The answer would be  b. hope this !