$$\begin{gathered} \text{Whathappenstothepriceandthequantityboughtandsoldinthecocoamarketifcountriesproducing} \\ \text{cocoaexperienceadroughtandanewstudyisreleaseddemonstratingthehealthbenefitsofcocoa?} \\ \text{Illustrateyouranswerwithademandandsupplygraph.} \end{gathered}$$

Countries producing cocoa experience drought - leads to decrease in production capacity & supply. It shifts supply curve leftwards.

A new study demonstrating health benefits of cocoa - leads to increase in demand due to favourable change in taste & preferences. It shifts the demand curve rightwards.

Previous equilibrium is at E, at demand & supply intersection, with equilibrium price & quantity = P & Q*

It is assumed that increase in demand = decrease in supply

Corresponding increase & rightward shift in demand (to D') and decrease & leftward shift (to S') in supply leads to situation of excess demand. It creates competition among buyers and increases equilibrium price (to P'). However, at the new equilibrium E' (where new D' & S' intersect) - the equilibrium quantity remains same at Q*