Because of unseasonable frosts (cold weather) in florida orange groves, the supply of oranges has substantially decreased. this statement indicates that: your the demand for oranges will necessarily rise. the equilibrium quantity of oranges will rise. the amount of oranges that will be available at various prices has declined. the price of oranges will fall. the price of grapefruits will fall.

The correct answer is: the amount of oranges that will be available at various prices will decline.

Explanation:

Unsuitable weather will cause the supply of oranges to decline. This causes the supply curve to move the left causing an increase in the price of oranges. The equilibrium quantity of oranges will fall as the demand curve will intersect the supply curve at a higher point.  

The number of oranges available at various prices will decline because of a reduction in the supply of oranges.

answer; is the sum of all individual demands curves;