The correct answer is - Exports grew significantly in the 1820's.
This graph shows us the exports of opium by the British toward China. Starting from the year of 1729 the exports of opium in China constantly grew, though relatively slowly. In 1790 there's significant rise in the exports, but that it kind of stagnates and the growth is minimal in next three decades.
<em>From the begging of the 1820's to the end of the 1820's the exports of opium start to grow very quickly. The rise in exports was so quick that in just this decade the exports of opium went up by around three times (tripled).</em>
That trend of rapid growth in the opium exports continued in the next decade, the 1830's, as well.
1. Enabled building of factory away from rivers powered machines = steam power (steam power enabled for factories to be established anywhere. It also provided substantial potential and could be utilized to power huge machines )
2. Developed system of interchangeable parts; increased production =Eli Whitney (at his arsenal Eli Whitney discovered the use of interchangeable elements and the milling device)
3. Made putting together of goods piece by piece; increased production greatly = assembly line (an assembly line is a construction process (oftentimes called a progressive machine) in which parts (interchangeable parts) are added as the semi-finished assembly passes from workstation to workstation where other parts are attached in series until the final assembly is designed. )
4.provided a tough, efficient building material for industrial purposes = steel (steel is an alloy of several metals but it consists of more iron than other minerals. Steel is solid and potent than iron)
The term length in the United States Senate would be "6 years," since the Founding Fathers wanted the Senators to be able to make decisions without constantly having to think about re-election.
The abortion rate<em> </em><em><u>60%</u></em><em> </em>during the 1970s, and has <em><u>declined</u></em> since 1980.