While you are numbers supplied depends upon speed (while the demand supply), supply is determined by loads of circumstances
Figure dos.4 shows an example of a change in supply. If there is a drought in Thailand, then at any given price, such as P*, quantity supplied of rice will decrease (Q1 to Q2). Since the price did not change, this decrease in quantity supplied must be due to a decrease in supply itself, represented by the leftward shift of the supply curve from SS1 to SS2.
A change in have comes from a change in a non-rate foundation from also provide, that is represented by a change of also have contour (Figure 2.4).
