In the market for mangoes, the situation that describes the graph above is this: b.) a change in technology makes it possible to process mangoes more efficiently.
What is the descriptor?
In the graph, we can see the price on the y-axis and the quantity delivered on the x-axis. A notable fact in the flow of demand and supply is the impact of technology. When there is a change in technology, that is, an upgrade, the processing of mangoes becomes better. This leads to an increase in the quantity demanded.
So, the best description of the graph is that a change in technology enhances the efficiency of processing mangoes.