Which of the following will shift the demand curve for Bournvita to the right

An increase in income will shift the demand curve for Bournvita to the right. When consumers have more income, they are likely to spend more on goods and services, including Bournvita. As a result, the demand for Bournvita will increase, and the demand curve will shift to the right. This shift means that at any given price, consumers will demand a higher quantity of Bournvita than before. Conversely, a decrease in income will lead to a decrease in demand for Bournvita, shifting the demand curve to the left. It's worth noting that the other options mentioned will not shift the demand curve for Bournvita to the right. A rise in the price of Bournvita, for example, will decrease demand, shifting the curve to the left. A tax on cocoa producers will increase the cost of production, which may lead to an increase in the price of Bournvita, also shifting the curve to the left. Finally, a fall in the price of Bournvita may lead to an increase in demand, but this would not shift the demand curve, as it represents a movement along the existing curve.