The major advantage of ownership in severalty is

This option is incorrect because ownership in severalty implies that the individual bears all the risks associated with the property. Unlike joint ownership arrangements, where risks and responsibilities can be divided among multiple owners, ownership in severalty does not provide the benefit of risk-sharing, placing the entire burden on the sole owner.

Joint decision making is a characteristic of co-ownership structures, such as partnerships or tenants in common, where multiple parties must agree on property-related decisions. In severalty, there is no need for joint decision-making, as the individual owner has complete authority over the property.

While this statement may be true in a general sense, it does not represent an advantage of ownership in severalty. In fact, the risks can be seen as high due to the sole responsibility for the property, but this aspect is not a benefit and does not relate to the advantages of having complete control over the property.