Why is the right of private property an essential characteristic of a market system?

Property rights: encourages people to invest in capital goods, they offer incentives for people to maintain their property, they also facilitate exchanges by making clear who owns a resource.

The correct answer is a. when they started making tools that will them in cultivating lands, they could raise crops and that made them attached to one place for a longer period of time. after that, they started domesticating animals and building their own permanent settlements that resemble the ones we have today.