Question

Why did the french rulers develop canals in viethanam

Answer 1

the French rulers constructed Canal in Vietnam in order to increase the production of rice to earn better profits and subsequently Vietnam became the third largest exporter of rice in the world

Answer 2

the French wanted to irrigate the Mekong Delta region for increasing the production of rice in that area...
so they constructed wide networks of canals in this region ( Vietnam)
this drastically helped in increasing the rice production from the area.....