In a free-market system, the most important aspect among the options listed is protecting private property rights.
Private property rights are fundamental to the functioning of a free market as they provide individuals and businesses with the assurance that they can own and control their resources and assets. This encourages investment, innovation, and the efficient allocation of resources as individuals are motivated to improve and utilize their property.
While providing security from poverty and equality of wealth are important social goals, they are typically addressed through other mechanisms outside the pure free-market system. Making allocation decisions for the entire nation is more characteristic of a planned or command economy rather than a free market.