In India, society is divided into 4 different groups called castes. The castes are ranked from the highest to the lowest and certain societal rewards are given to those in the higher castes, but withheld from the lower castes. This ranking is an example of___

social stratification systems

Explanation:

Systems of social stratification differ by their degree of social mobility. Systems of stratification are majorly divided into four types: slavery, estate systems, caste systems, and class systems. In India, Hinduism is the major religion and they practice the caste system of social stratification which is traced back to ancient India. The four classes are: the Brahmins, the Kshatriyas (also called Rajanyas), the Vaishyas, and Shudras (labouring classes)

what terms are there?

explanation:

allergens: overstimulate the nerve system

neurotics: attack nerve cells

mutagens: damage or otherwise alter dna sequence

generators: cause defects during growth and development  

carcinogens: cause unchecked cell growth

i hope you get the idea according to me these are the effects that happened.