Asymmetric information refers to a situation in which one person have more information about the other person while engage in a transaction.
Suppose there are a buyer and a seller in a insurance market. In this market, a buyer have more information than the insurance seller because he knows better about his health condition and how much he is involved in riskier activities. Therefore, this problem is known as adverse selection.
Moral hazard refers to a problem which occurs after the transaction has occured. It occurs when someone try to engage in riskier activities because he or she knows that other party bears the burden of cost if there is anything goes wrong.
The fertile land along the great Nile River supported the Egyptian civilization. Egyptians built cities, great pyramids, and a strong kingdom. It expanded into a great empire as art, literature, and architecture blossomed.