When did the first economies begin to develop?

When all the hunter-gatherers died

When money was invented

When people began to grow crops and domesticate animals

When the first cities were built

When people began to grow crops and domesticate animals

Explanation:

The cultivation and domestication of animals were the first signs of the process of accumulation observed in primitive societies. Accumulation, in turn, gave rise to the surplus - when output was greater than the needs of the producer - and encouraged men to exchange their respective surpluses. Thus came the first evidence of economic development. When societies became a bit more complex, the need arose for the creation of currency to facilitate the exchange of surpluses.