Cities are large and densely populated areas , whereas villages are rusticrural and focus on only on agriculture.
city refers to area/ cities refer to areas
The standard of living in the urban regionareas is much better and complicated than it is therethat in countryside.
.... pay attention to the grammar corrections I made
This essay focuses on the reasons for this statement and also the possible measures to amend the lifestyles of the agrarian life.
My suggestion;
In my view there are various reasons for this difference of living standards. This essay is focused on discussing those issues and proposing measures that can help improve living standards of rural areas.The main reason for the good standard of living in the metropolis is the effect of the inter-mixing of multi-cultural communities.
....first, "inter-mixing" does not sound a proper usage. Also, I cannot agree with this idea as a reason for people to having higher living standards in the cities. There are many more important reasons like advanced infrastructure (roads, hospitals, schools, railway etc.), more educated people, better employment opportunities etc.