Answer:
d) a caste system
Step-by-step explanation:
Caste system is a class structure that is determined by birth. When you are born into a certain position, it is hard to change this position. In a few words, caste system can be summarized as "if someone is born poor, is very likely that he/she will stay that way for the rest of his/her life"
Mohit spent his days combing through garbage and watching his friends trying to overcome their lower-class status and failing. So, he accepted that he will remain this way for the rest of his life accepting his fate since he lives in a close society in India, this is an example of living under a caste system.