Final answer:
A change in the money price of a product results in a movement along the demand curve, reflecting a change in quantity demanded due to the price change. Shifts in the demand or supply curves are caused by factors other than the price of the product.
Step-by-step explanation:
A change in the money price of a product, other things consistent, is: a) A movement along the demand curve. This is because the price is the variable that directly affects the quantity demanded. When only the price changes and nothing else does, consumers will either buy more or less of the product, which is represented by moving up or down along the same demand curve. An increase in price typically results in a movement up along the demand curve (less quantity demanded), and a decrease in price causes a movement down along the demand curve (more quantity demanded).
Alternatively, a shift of the demand curve would signify that another factor, not the price, has changed (e.g., consumer preferences, income levels, expectations of future prices). Similarly, a shift of the supply curve would indicate that some non-price determinant of supply has changed (e.g., production costs, technology, number of sellers). A movement along the supply curve, being analogous to the demand side, would imply a change in the price level of the product that pertains to suppliers' willingness to sell different quantities.
It's important to note that a shift in one curve does not cause a shift in the other; rather, it causes a movement along the other curve. This distinction is crucial for understanding how markets respond to various changes.