Identify contributions by copernicus, galileo, isaac newton, robert boyle

The contribution of Nicolaus Copernicus is that he way famously known for establishing the heliocentric nature of the Solar System. Galileo Galilei contributed to the fields of physics, mathematics, and philosophy just to name a few, but his major contribution was he invented and improved on the telescope. Isaac Newton developed the principles of modern physics known as Newtons law.  Robert Boyle was a philosopher that contributed to experimental chemistry and is well known for his gas law named Boyles law.

the answer is d. tariffs were raised by america's trading partners after the smoot-hawley tariff act, decreasing exports, and declining job rates.

on this day in 1913, henry ford installs the first moving assembly line for the mass production of an entire automobile. his innovation reduced the time it took to build a car from more than 12 hours to two hours and 30 minutes.