Could you provide the statements?
Answer:First one is (Peter gets into a fight with the musicians because they will not play a happy song for him. The second answer is petty argument like fueds etc.
Explanation:
Two problems would be overcrowding which could potentially result in rapid disease outbreak and lack of resources to go around to everyone that inhabits the urban area
two opportunities would be an opportunity for job specialization and an opportunity for fleeing of racial persecution as their is lots of diversity in urban areas
In messages; if you know them, yes; but not in questions or pages where everyone can see.