The answer would be Agriculture
I know this because I have had a test with same question and it was correct
Hope it helps
Europeans traded sailing equipment to other people so they could have better transportation.
That a strong central government was needed instead of classes that wielded power over the poor. The Revolution did away with the 3 estates in which the nobility and clergy lorded heavily over the common people. Napoleon expanded on this, strengthening the central government and attempting to strengthen the economy instead of holding it in one area of the populace.