17th c-small landholdings, low-productivity agricultural practices, poor transportation, and adverse weather limited and disrupted the food supply, causing periodic famines kept population low.
18th c-higher agricultural productivity and improved transportation increased the food supply, allowing populations to grow and reducing the number of demographic crises.

i beleive its 1)aids

the answer is a) to be able to obey them.

increases in demand are shown by a shift to the right in the demand curve. this could be caused by a number of factors, including a rise in income, a rise in the price of a substitute or a fall in the price of a complement.

which the answer is:

b

it   would try making the   president who would the economy get out of depression picked