Final answer:
A decrease in supply can be caused by factors such as increasing production costs like input prices, labor costs, materials costs, and interest rates.
Explanation:
A decrease in supply can occur due to various factors such as a rise in production costs. For instance, an increase in input prices will lead to a decrease in supply as it raises the cost of production. Furthermore, factors like labor costs, materials costs, and interest rates can all contribute to a reduction in supply.
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