A balanced ecosystem. The pigs, poultry, fish and vegetables of all kinds that they had purchased it. To reduce expense. While the vegetables are grown to be sold in the market.
A balanced ecological system is breeding pigs, ducks, chickens, fish and vegetables of all kinds that they've bought to eat in order to reduce expenditure, At the same time, are able to grow vegetables in the market.
The ecological balance of the pigs poultry fish and vegetable used to buy all kinds of self-eating to reduce expenditures while the vegetables can be planted to sell in the market.