a-what does a geographer do first when he wants to divide a certain space into regions?
Chooses one factor or a small number of factors as the basis of his division
b-what do we call the form of region which is easiest to understand?
The binary type
c-what type of regions are the ones defined on a political basis?
The binary type
d- which regions are more definite and physical regions ore language regions?
physical regions
e- is a binary regions always defined by the existence of a factor or factors?
مو محدده عندي الاجابه 
f-why is it often not possible to define regions on a binary basis?
Homogeneous
g- what is centripetal regions?
Regions is a regions in which the characteristics on which the definition is based have their maximum concentration in a centra part of the regions
h-what is a nodal regions?
A particular type of the centripetal system is the nodal regions
i- does a nodal regions always have the same size and shape?
No doesn't
J- why do we have several type of regions?
Great help to any student of geography