Hay fitria, your understanding tenses is good, may i give you may suggestion in some parts of your essay
The map presents the difference
i think that are more than one change : the differences
The noticeable development is two villages ...
The noticeable development is two villages which separate in 1962 and now those become a unit.
In 1962, two villages were separated ...
In 1962, two villages were separated by a distance and those were two different areas without connecting way.
I hope that my suggestions help.