This change in price means that there is a shortage of lettuce and the price of tacos will increase. That if tacos are made with lettuce and everything else remains constant (ceteris paribus).
The correct answers are the following:
The market equilibrium represents the intersection between demand and supply, the point at which the desires of consumers and producers meet.
When the quantity available in the market decreases below the quantity demanded, the equilibrium is broken and there is a shortage. The price of the product will rise and, in turn, the price of products which are subsequently manufactured with this one will increase too.
On the other hand, if the quantity available is greater than the amount demanded by consumers, there will be an excess of lettuce in the market and its price will drop.
