According to malthus, a fixed quantity of land and a growing human population will eventually produce:

It will produce a stationary in which will growth will cease. A stationary is when something is like a pencils, pens etc. It can also mean something standing still or a thing being still.

the answer would be voluntary exchange -

"the act of buyers and sellers freely and willingly engaging in market transactions. moreover, transactions are made in such a way that both the buyer and the seller are better off after the exchange than before it occurred."

hope this : )

-shy