If the price of peanut butter increases significantly, which of the following scenarios best illustrates the economic concepts of substitutes and complements?

When the price of peanut butter goes up a lot, people might look for other options to use instead. This is where substitutes come in; for example, if peanut butter becomes too expensive, someone might start buying almond butter instead because it can be used in similar ways. On the other hand, complements are products that are often used together, like peanut butter and jelly. If peanut butter's price rises, people might buy less jelly too, since they usually enjoy them together. So, the increase in peanut butter's price leads to more almond butter being bought as a substitute and less jelly being bought as a complement.