Product possibilities curve signifies the substitute

Product possibilities curve signifies the substitute combination off dual or more goods or services that goods handover to other economy production goods or services. This curve helps in defining what amount of a extra good or a service an economy can manage to pay for to produce without risking the essential production of an vital good or service. ( insert reference and edit) Let’s take an example of the two goods which is rabbit and oranges so in scenario A if u produces 5 rabbits with same amount of time and with same techniques than the production of oranges is 0 but gradually if you produce the less amount of commodity X then you will get time to produce commodity Y so you see the X is decreased as other side the Y is increasing