Question

what type led to rapid increase in rhe demand of food grain in 1789

Answer 1

1)The population of France rose rapidly from 1715 to 1789 ,which led to rapidly increase in the demand for food grains.
2)-Production of grains could not keep pace with the increase in population ,so the price of bread ,staple diet of majority was increased.
3)-Thus,this led to subsistance crisis in france in 1789.
hope it helps:) 

Answer 2

subsistence crisis : population was more so demand for the food grains increased and production of the food grains was same

as a result there was a rapid increase in the demand of food grains as well as the prices