Answer:
Decrease in arable land.
Explanation:
The main consequence of overpopulation in the rural areas of the Vallée du Saint-Laurent during the second half of the 19th century is the decrease in the arable land of the rural areas due to building of more homes for people. The decrease in cultivable land leads to lower production of food for the population which causes food shortage in the village so this issue can be solved if the productivity per hectare increases by the farmers or we can prevent increase the population.
