Topic sentences draw readers' attention to the main
purpose of a piece of writing.
it sends the same message as a thesis or claim
write a topic sentence that is clear and direct.

What are economic systems and how do they differ?

Which sentence best explains how steam power changed agriculture in england between 1810 and 1850? a. farmers started using steam-powered machines to spray chemical fertilizers and pesticides. b. livestock farmers began using steam-powered machines to milk cattle and shear sheep. c. steam-powered railways transport and sell agricultural produce far from where it was grown. d. steamships to transport large numbers of people from the united states to english farms.

What are three supporting points as to why opium was wrong in the chinese trade? why should it have stopped? (opium wars)