How did the rise of italian city states lead to the renaissance

IN order this time lol

#2: The classical ideas led to a rebirth of art, culture, and intellect, and linked teachings and discoveries from different countries (and states) and together, helped spur Europe into modernizing
#3: The rise of city states help lead to the Renaissance, for wealthy families that rule city-states supported artists, scientists, etc to helping discover new creations to show how mighty they are
#4: New technologies include larger and faster ships, larger sails, compasses, a newer variety of food (hardtack was invented) 
#5: Ghana, Mali, Songhai (?)  (first two for sure)

The answer is ethnic groups.