Answer:
O Concert tickets
Step-by-step explanation:
Elastic demand is the demand that is highly responsive to changes in prices. A small change in price causes the demand to change by a big proposition. When the demand is elastic, the change in demand is not propositional to changes in price.
Non-essential goods tend to have elastic goods. These are the goods that consumers can survive without. Demand for non-essential tends to decrease or increase in a big proposition when prices rise or fall by a small margin. From the list provided, concert tickets are non essential goods.