Question

Wch are the social groups formed on the basis of our choice

Answer 1

Some people are atheists, they don't believe in God or any religion. Some people choose to follow a religion other than the one in which they were born. These differences are based on our choices. 

Answer 2

The social groups formed on the basis of our choice :-
 
1) Religion to be followed - We ourselves decide the religion we want to follow and if not to follow any.
2) Our career and education are based on our choice of what we want to aspire and achieve of in our life as a career.