Overall, these are well-written paragraphs. Not only that, you have answered what is being asked in the prompt. Just make sure that you write them due to time constraint.
Recently, the world has urbanized.
This is a grammatically incorrect sentence, since the word urbanized.
is a transitive verb, meaning that this verb needs a corresponded object.
years ago where most of the world population live in rural areas that are
The time duration is in the past time. Writing such a sentence with past tense is more acceptable. A closer look at this:years ago where most of the world population WHO LIVED in rural areas that WERE
positive effects of live in small community are
this experiences positive effects on people living in small community such as ...
the negative effects are high interdependence and limited freedom of expressions which can restrict progress and success of each member of the community can be the detrimental effects that should be taken into consideration .
live in small community provides merit
Living in small community brings considerable
merits (always add more adjectives. see the red one)
rather than live in big society
rather than LIVING in larger society
However, it presents demerit which could obstruct
The reverse would be true as this could obstruct
Hope this helps :D
A heap of luck