If you buy less clothing because the price of clothing at your favorite store has gone up, what has happened?

The purchase and sale of goods and services is managed by the mechanisms of supply and demand in a market economy. The mechanism for adjusting supply and demand is price. If the price has risen and you have stopped buying, demand will be lower and in the future the store will have to lower prices again unless other consumers are willing to pay a high price. Another important element is scarcity. If the good becomes scarce, as when a store sells its stocks, the price of the remaining merchandise tends to rise.

the consumer demand because the members have to be aware if people are going to buy what they want to sell in this case either energy drinks or a car wash.

it would be d). more resources must be obtained to attain that combination of goods and services