how did geography affect the life of the Ayran groups that invaded India? please help. thanks
The present belief is that "The Aryan Invasion" of India is a myth. Historical, genetic and geographic studies has supported this finding. Here is an interesting site that may prove helpful to you. You can find other information by putting "Aryan Invasion, India, geography" into a Google search.
There is interesting geographical information at this site regarding the drying of a river which influenced the movement of huge numbers of people.