If the price of potatoes increases significantly, which of the following is the most likely economic outcome regarding corn, and what is the underlying cause of this effect?

When the price of potatoes goes up a lot, people might decide to buy less potatoes because they are now more expensive. Instead, they might choose to buy more corn, especially if corn is a cheaper alternative. This happens because potatoes and corn can be substitutes for each other; if one becomes too costly, people look for other options. For example, if a bag of potatoes costs $5 and a bag of corn costs $2, consumers might switch to corn to save money. The underlying cause is that when the price of one item increases, it often leads to an increase in demand for its substitute.