C: depositing silt, which created rich soul for growing crops.
The answer is the Antisocial personality disorder. This is a disorder characterized by patterns of behavior which deviate from social expectations and norms. An individual suffering from this disorders is often involved in crimes, aggressive behaviors, illegal activities and other harmful actions that put another individual at risk.
The ~unequal~ statuses of different individuals in a society. for example, a doctor has a higher social status than a janitor working at the same hospital. the doctor might be awarded for his work, while the janitor is mostly ignored. the doctor may also have come from a fairly wealthy family and received a good education, while the janitor may have had economic disadvantages and a poor quality education. so the doctor and the janitor are socially unequal. social inequality is very closely connected to economic inequality, so if you ever see the phrase "socio-economic inequality," that's why.
