Which was an effect of the industrial revolution? a. decline in european population b. the fall of labor unions c. increased food prices d. decreased travel times

The correct answer is D. Decreased travel times.
The industrial revolution revolutionized the transport as well, so in this period we have the emergence of transporting machines, like the trains for example, and they were also getting better and better as the year passed by, and they were of great help to the people, especially when they had to travel on long distances.

Answer decreased soil salinity;