In india, the introduction of sanskrit, hinduism, and the caste system all occurred during the time period of

Aryan civilazation. The word "Arya" is derived from Sanskrit word meaning self-designation. The Aryan race was a racial gathering term utilized as a part of the time of the late nineteenth century to the mid-twentieth century to portray numerous people groups.

During the Aryan civilisations.

The answer to this question is  c. pharmaceutical accumulation  reclaimed water refers to the water that being used again after it already  used for agricultural purposes.this type of water often contains pharmaceutical accumulation because of the chemical fertilizer that is used for the plants is absorbed into the water.