Why do Indian movies especially southern use only white actresses?

 Actually it's not that point that which heroines they are used in their movies especially the Black or The White actresses heroines matter here is what the heroines which are used in the south movies in India in film industries are very much prettiest and healthiest and protest at compared to the other heroines specially if you compare them from the Bollywood heroine because they do hard exercises, yoga and eat healthy foods and drink some coconut waters everyday that's why they are white because their skin is very healthy, pure without any show off as compared to the Bollywood heroine hindi show the culture of our mythology in India through their films to the audiences you can take them example of Tamanna Bhatia ,Shruti Hassan ,Rakul Preet Singh ,Sai Pallavi ,Kirti Suresh and Shriya Saran also these all do a very much hard routine part of their life.See these above actresses natural figure