increase in the supply of a product can be caused by?

Step 1: Analyze the question The question asks what causes an increase in supply (a shift of the supply curve to the right), not a change in demand.

Step 2: Explain the concept Supply and demand have different determinants:

• Determinants of demand: consumers' tastes and fashion, consumers' income, prices of related goods, population.
• Determinants of supply: cost of production, technology, prices of inputs, taxes and subsidies, weather (for agriculture), number of producers.

Be careful with the price of the product itself. A rise in a product's own price causes an extension (a movement along the supply curve). It does not shift the curve, so it is not an "increase in supply" in the strict economic sense.

Step 3: Evaluate each option

• A. Change in taste and fashion of consumers: This affects demand, not supply. ❌
• B. Increase in the income of consumers: This also affects demand. ❌
• C. A fall in the cost of production: Producers can now supply more at every price because production is cheaper and more profitable. The supply curve shifts right. ✅
• D. Increase in the price of a product: This only causes an extension of supply, which is a movement along the same curve. ❌

Step 4: Answer The correct option is C. a fall in the cost of production.

Tip: Ask yourself whether the factor concerns consumers or producers. Consumer factors (taste, income) change demand. Producer factors (cost, technology, taxes) change supply. Also remember that a change in the product's own price causes only a movement along the curve, never a shift.