1. there are many useful places for e,g shops, stores markets and etc.
2. beacause the air is more clear in the city side and its more peacfull
3. а 3 там вопрос где бы вы хотели жить вы городе или селе как бы за городом если за город вот ответ " i would like to live in the country side, beacause its very peacefull and quite and the air is fresh.
а если в городе вот " i would like to live in the country beacause it has many places that you can buy stuff and its more interesting.