Which of the following determinants of supply cannot be predicted easily?

The determinant of supply that cannot be predicted easily is national emergencies. This is because national emergencies, such as natural disasters or political crises, can occur unexpectedly and disrupt the supply of goods or services. For example, a flood may destroy crops, leading to a decrease in the supply of food. Since national emergencies are unforeseeable, it is difficult to plan or make predictions about their impact on the supply of a commodity. On the other hand, factors such as the price of the commodity, new techniques of production, and mobility of labor can be predicted to a certain extent and can be accounted for in supply projections.