Answer:
The caste system is structured in terms of the businesses. The area of work defines what caste a certain person belongs to. Work lines such as agriculture and trade are considered as the higher and more prestigious castes whereas the lower level works such as music is considered as a caste of lower rank.
People are known from the caste background they belong to and that defines their role in the society. People tend to marry in the same caste to avoid mixing up in lower castes. some castes are given preference over other in the employment market. This also gives rise to inequality in the society.
Ea told Marduk that if he was victorious he would be the head god forever if Marduk would defeat Tiamat. Ea was a very smart god though he cannot make a deal of his own. Ea provided food, entertainment and a strong date of wine to the rest of the gods and make them agree of his idea.
