Even though they did not develop a unified empire, the Vedic peoples who settled in South Asia did develop a widespread system of social and economic hierarchy. What were the groups in this hierarchy called?

VARNAS

Explanation:

The VARNAS are divided into four caste group which include Brahmins (priest and scholars), Kshatriyas (kings, governors and warriors), Vaishyas(cattle herders, agriculturist, artisans and merchants) and Shudrsd ( laborers and service providers).

d is the correct answer.

b is incorrect because it makes food by itself

c is incorrect because us humans don't know how to produce their own food using the sun like plants.

a is incorrect because consumers can depend on carnivores for eating food for consumers to eat the dead organism. same thing with omnivores.

its c i google it wish u luck