Answer:
4) Their feelings of loyalty eventually weakened. In the past, Romans cared so deeply about their republic that they willingly sacrificed their lives for it, but as conditions declined, so did their sense of patriotism. They became indifferent to the Roman empire's fate.
5) The Roman population grew quickly, thanks to surplus production of grains, olives and other crops. The extra population later helped Rome's military expansion by providing a large supply of troops. The surplus also helped Rome to establish trade ties with other Mediterranean powers, enhancing the city's economic might.