Does anyone know any university /educational events for year 9s in london?

Which of the following inventions most directly allowed ancient farmers to produce a surplus ?

Which is the main inference that can be drawn from adam smith's book the wealth of nations? a) for an economy to work flawlessly, it shouldn't have to serve and moral goals.b) the government must control a free-market economy, or economic problems will arise.c) a free-market economy works well only without the government's interference. d) free trade will only hurt economies and should be stopped by governments.

The difference between ptolemy iii and ptolemy xiv