1. It further established the already existing caste system. With the belief of being born in their caste is because of committing bad deeds in one's previous life.
2. Supporting the first point, Hinduism's belief of karma also puts forward that anything you do whether good or bad, will come back to you. This makes people conscious of their actions.
3. Another one is that it teaches to respect all living, believing everything is God's children. (rats, cows, and the likes)
In the north of IRAN we find (800 km long and 320 km wide) the Dasht-e-Kavir Desert, being a very arid region with temperatures up to 50 degrees Celsius, in the west the desert borders a salt lake called Darya -ye Namak which is formed of large plates of salt because they evaporate because of the high temperatures of the desert
I hope I've helped
<span> C. German expansion and British appeasement</span>