Answer to Question 1
A metropolis is a regional center for a whole area. An urbanized area is a densely populated region, dominated by a human-built environment, with more than 400 people per square kilometer.
Answer to Question 2
It would be necessary to determine the kind of food that is consumed by the population; it would be a waste of effort and so on to bring in food that the population does not know how to prepare or consume. Once the kind of food is known, contacting the FAO and Famine Early Warning System Network would be the next step. Once the immediate food problem has been addressed, it would be time to plan how to avoid the problem in the future.