What invention was in use before the second industrial revolution?
1.reaper
2.telephone
3.lightbulb
4.phonograph

The answer is

a) Reaper.

the reaper was known as a scythe. It was the primitive version of our modern weed-wacker or lawnmower. The Reaper (scythe) featured a 60-90 centimeter curved single edged blade with a 4-5 foot handle for swinging, but they also came smaller for other needs.

b: to eliminate competition from other farmers

a system of cooperative federalism emerged, as the powers of the federal government expanded.