I think you forgot to give the options in this question. I am answering this question to the best of my capability and hope that it helps you. An economic downturn can cause the demand curve to shift left. During this time actually the demand of a product in the market falls and so the producers have to lower the price of the products as well.
it means for a influence to start or for a change to be made
I would help you but u do not know what to do
Tribunes took the place of emperors
Yes, the immigrants left and moved throughout he country.