What happened once people had a surplus of food?
a. they irritation crops
b. they began to divide up the labor and do other tasks
c. they no longer needed to trade with other society
d. they could be considered a ciliation

An effect of the steamboat's popularity was that fewer people traveled by rail. o steam locomotives became less popular. people began to build canals in the united states and europe. o more people began to travel between the united states and europe.